Patents by Inventor Hyung Hee CHO
Hyung Hee CHO has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20250062755Abstract: Disclosed are an apparatus and a method for compensating for a phase delay of a resolver signal. The apparatus includes an input/output interface, and a processor connected to the input/output interface, wherein the processor receives a command signal and the resolver signal through the input/output interface, calculates a delay time of the resolver signal with respect to the command signal based on the command signal and the resolver signal, calculates a compensation time based on the delay time, and compensates the command signal based on the compensation time.Type: ApplicationFiled: August 9, 2024Publication date: February 20, 2025Applicants: HYUNDAI MOBIS CO., LTD., HYUNDAI MOTOR COMPANY, Kia CorporationInventors: Won Hee JO, Hyung Min PARK, Joo Won PARK, Yeon Ho KIM, Beom Cheol CHO, Yun Ho CHOI, Tae Hwan KANG, Do Hyeon HAM
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Publication number: 20240318940Abstract: A multiple and broadband stealth structure comprises a radar absorption unit that absorbs broadband microwave, a low-frequency transmission filter unit that is stacked on an upper portion of the radar absorption unit, and an infrared radiation unit that is combined with the low-frequency transmission filter unit to selectively emit infrared ray, thereby selectively controlling the infrared emissivity of the surface to emit infrared radiation only through an atmospheric absorption window with a low infrared transmittance and to avoid the infrared detection system.Type: ApplicationFiled: March 6, 2024Publication date: September 26, 2024Inventors: Hyung Hee CHO, Nam Kyu LEE, Joon Soo LIM, In Joong CHANG, Hyung Mo BAE, Ju Yeong NAM
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Patent number: 12043379Abstract: Proposed is an airfoil wing-shaped aircraft including a body having a wing-shaped longitudinal cross-section and having an upper surface on which a shape of a concave curvature-surface portion is formed along a center axis in a streamwise direction, a fluid inlet being formed in each of the opposite lateral sides of a leading portion of the body, and a fluid output being formed in each of the opposite lateral sides of a tail portion of the body, wherein a duct connects the fluid inlet and the fluid outlet to each other.Type: GrantFiled: October 4, 2021Date of Patent: July 23, 2024Assignee: UIF (UNIVERSITY INDUSTRY FOUNDATION), YONSEI UNIVERSITYInventors: Hyung Hee Cho, Seungyeong Choi, Jihyuk Kim, Juyeong Nam, Maroosol Yun, Taedoo Yoon, Minho Bang, Joon-soo Lim
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Publication number: 20240229652Abstract: The present invention relates to a gas turbine blade having a shelf squealer tip, the gas turbine blade including an airfoil-shaped blade housing, and a squealer tip extending from an edge portion of a tip surface that is an end surface of the blade housing, in which the squealer tip is formed only on a part of the edge portion of the tip surface. According to the present invention, it is possible to maximize film-cooling performance on the tip surface and additionally reduce an aerodynamic loss by suppressing high-temperature main flow reattachment and swirl flow generation on the tip surface.Type: ApplicationFiled: May 4, 2022Publication date: July 11, 2024Inventors: Jeong-Woo KIM, Hyung-Hee CHO, Joo-Hyoung LEE, Min-Ho BANG, Jeong-Ju KIM, Seung-Yeong CHOI, Tae-Hyun KIM, Hee-Seung PARK
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Patent number: 11788418Abstract: Provided is a gas turbine vane and blade assembly in which lattice structures are installed between an impingement plate and an effusion plate. The gas turbine vane and blade assembly is capable of enhancing cooling efficiency in an impingement/effusion cooling technique. In addition, the gas turbine vane and blade assembly can be manufactured using an additive manufacturing technique, and the lattice structures are capable of replacing supports that are used during an additive manufacturing process, and improving not only structural rigidity and stability but also cooling performance.Type: GrantFiled: May 12, 2022Date of Patent: October 17, 2023Assignee: Industry-Academic Cooperation Foundation, Yonsei UniversityInventors: Hyung Hee Cho, Ho Seop Song, Minho Bang, Heeseung Park, Taehyun Kim, Seungyeong Choi, Jeong Ju Kim
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Publication number: 20230314677Abstract: Proposed is a 3-dimensional resonant structure-based infrared selective emitter capable of maximizing the infrared selective radiation function by broadening the emissivity in the non-detection bands with resonance phenomena between multiple resonator units at the same time as securing infrared camouflage and energy dissipation-resultant surface thermal stability by reducing the emissivity significantly in the infrared detection band and selectively dissipating energy to the non-detection bands.Type: ApplicationFiled: April 5, 2023Publication date: October 5, 2023Inventors: Hyung Hee CHO, Nam Kyu LEE, Joon-Soo LIM, In Joong CHANG, Ju Yeong NAM, Hyung Mo BAE, Ji Hyeok KIM
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Patent number: 11746661Abstract: A turbine blade having cooling holes formed therein and a turbine including the same are provided. The turbine blade includes an airfoil having a leading edge and a trailing edge formed thereon and a cooling passage defined for flow of a cooling fluid therethrough, and a cooling hole configured to communicate between the cooling passage and outside in the airfoil and having an inlet and an outlet, wherein the cooling hole includes an expanded portion and a grooved portion formed in the outlet, the grooved portion being recessed from the expanded portion toward the trailing edge.Type: GrantFiled: June 22, 2022Date of Patent: September 5, 2023Inventors: Ye Jee Kim, Hyung Hee Cho, Minjoo Hyun, Hee Seung Park, Seungyeong Choi, Taehyun Kim
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Publication number: 20230266508Abstract: The present invention provides an infrared selective emitter that can selectively emit infrared energy in a desired wavelength band, can be easily applied to a curved surface due to its flexible properties, and can protect the formed surface structure of the infrared selective emitter from external stimuli such as friction, thereby improving wear resistance and maximizing the function of infrared selective emission.Type: ApplicationFiled: February 22, 2023Publication date: August 24, 2023Inventors: Hyung Hee CHO, Nam Kyu LEE, Joon-Soo LIM, In Joong CHANG, Ju Yeong NAM
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Publication number: 20230221618Abstract: The present invention provides an infrared selective emitter in which since infrared energy can be emitted in a desired wavelength band by adjusting a metamaterial having a repeating structure on a plane, infrared camouflage is possible by attaching to the surface of the shape of an object to be camouflaged, and at the same time, the infrared selective emitter has flexible characteristics that can be applied to curved surfaces without limitations on the shape of an object.Type: ApplicationFiled: December 22, 2022Publication date: July 13, 2023Applicant: UIF (University Industry Foundation), Yonsei UniversityInventors: Hyung Hee CHO, Namkyu LEE, Joon-Soo LIM, Injoong CHANG, Juyeong NAM, Hyung Mo BAE, Maroosol YUN
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Patent number: 11655716Abstract: A cooling structure for a trailing edge of a turbine blade is provided. The cooling structure for the trailing edge of the turbine blade comprising an airfoil shaped blade part including a leading edge, a trailing edge, a pressure surface and a suction surface connecting the leading edge and the trailing edge, and a cavity channel formed in the blade part and through which a cooling fluid flows, the cooling structure including slots and lands arranged alternately on the trailing edge along a span direction of the pressure surface by cutting a portion of the pressure surface, the slots communicating with the cavity channel and defined by adjacent lands where the pressure surface remains, wherein a pin-fin structure is disposed in the cavity channel on an upstream side of the slot, and wherein the cooling fluid is introduced through a micro-channel formed inside the pin-fin structure and is discharged through film cooling holes formed in the pressure surface.Type: GrantFiled: July 21, 2021Date of Patent: May 23, 2023Assignee: DOOSAN ENERBILITY CO., LTD.Inventors: Chang Yong Lee, Hyung Hee Cho, JeongJu Kim, Seungyeong Choi, Hee Seung Park
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Patent number: 11624284Abstract: An impingement cooling structure is provided. The impingement cooling structure includes a flow channel formed between a first wall and a second wall facing the first wall, a plurality of impingement cooling holes disposed in the first wall such that the plurality of impingement cooling holes are spaced apart from each other along the flow channel, and a flow diverter convexly protruding from a surface of the second wall in each space between injection axes of the plurality of impingement cooling holes.Type: GrantFiled: September 13, 2021Date of Patent: April 11, 2023Assignee: DOOSAN ENERBILITY CO., LTD.Inventors: Chang Yong Lee, Hyung Hee Cho, Min Ho Bang, Tae Hyun Kim, Ho Seop Song
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Publication number: 20230016532Abstract: Provided is a gas turbine vane and blade assembly in which lattice structures are installed between an impingement plate and an effusion plate. The gas turbine vane and blade assembly is capable of enhancing cooling efficiency in an impingement/effusion cooling technique. In addition, the gas turbine vane and blade assembly can be manufactured using an additive manufacturing technique, and the lattice structures are capable of replacing supports that are used during an additive manufacturing process, and improving not only structural rigidity and stability but also cooling performance.Type: ApplicationFiled: May 12, 2022Publication date: January 19, 2023Inventors: Hyung Hee Cho, Ho Seop Song, Minho Bang, Heeseung Park, Taehyun Kim, Seungyeong Choi, Jeong Ju Kim
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Publication number: 20220412217Abstract: A turbine blade having cooling holes formed therein and a turbine including the same are provided. The turbine blade includes an airfoil having a leading edge and a trailing edge formed thereon and a cooling passage defined for flow of a cooling fluid therethrough, and a cooling hole configured to communicate between the cooling passage and outside in the airfoil and having an inlet and an outlet, wherein the cooling hole includes an expanded portion and a grooved portion formed in the outlet, the grooved portion being recessed from the expanded portion toward the trailing edge.Type: ApplicationFiled: June 22, 2022Publication date: December 29, 2022Inventors: Ye Jee KIM, Hyung Hee Cho, Minjoo Hyun, Hee Seung Park, Seungyeong Choi, Taehyun Kim
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Patent number: 11448074Abstract: An airfoil having a leading edge and a trailing edge is provided. The airfoil includes a rear cooling path connected to the trailing edge to discharge air to the trailing edge, a plurality of cooling fins formed in the rear cooling path, and a flow guide rod connecting the cooling fins to support the cooling fins, wherein each of the plurality of cooling fins includes an upper fin portion protruding upward from an upper portion of the flow guide rod, a lower fin portion protruding downward from a lower portion of the flow guide rod, and an intermediate fin portion inserted through the flow guide rod.Type: GrantFiled: December 27, 2021Date of Patent: September 20, 2022Inventors: Jung Shin Park, Ki Hoon Yang, Ki Don Lee, Hyung Hee Cho, Hee Seung Park, Seok Min Choi, Yong Jin Kim, Su Won Kim
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Publication number: 20220220857Abstract: An airfoil having a leading edge and a trailing edge is provided. The airfoil includes a rear cooling path connected to the trailing edge to discharge air to the trailing edge, a plurality of cooling fins formed in the rear cooling path, and a flow guide rod connecting the cooling fins to support the cooling fins, wherein each of the plurality of cooling fins includes an upper fin portion protruding upward from an upper portion of the flow guide rod, a lower fin portion protruding downward from a lower portion of the flow guide rod, and an intermediate fin portion inserted through the flow guide rod.Type: ApplicationFiled: December 27, 2021Publication date: July 14, 2022Inventors: Jung Shin PARK, Ki Hoon Yang, Ki Don Lee, Hyung Hee Cho, Hee Seung Park, Seok Min Choi, Yong Jin Kim, Su Won Kim
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Publication number: 20220127964Abstract: A cooling structure for a trailing edge of a turbine blade is provided. The cooling structure for the trailing edge of the turbine blade comprising an airfoil shaped blade part including a leading edge, a trailing edge, a pressure surface and a suction surface connecting the leading edge and the trailing edge, and a cavity channel formed in the blade part and through which a cooling fluid flows, the cooling structure including slots and lands arranged alternately on the trailing edge along a span direction of the pressure surface by cutting a portion of the pressure surface, the slots communicating with the cavity channel and defined by adjacent lands where the pressure surface remains, wherein a pin-fin structure is disposed in the cavity channel on an upstream side of the slot, and wherein the cooling fluid is introduced through a micro-channel formed inside the pin-fin structure and is discharged through film cooling holes formed in the pressure surface.Type: ApplicationFiled: July 21, 2021Publication date: April 28, 2022Inventors: Chang Yong LEE, Hyung Hee Cho, Jeong Ju Kim, Seungyeong Choi, Hee Seung Park
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Publication number: 20220127963Abstract: An impingement cooling structure is provided. The impingement cooling structure includes a flow channel formed between a first wall and a second wall facing the first wall, a plurality of impingement cooling holes disposed in the first wall such that the plurality of impingement cooling holes are spaced apart from each other along the flow channel, and a flow diverter convexly protruding from a surface of the second wall in each space between injection axes of the plurality of impingement cooling holes.Type: ApplicationFiled: September 13, 2021Publication date: April 28, 2022Inventors: Chang Yong LEE, Hyung Hee CHO, Min Ho BANG, Tae Hyun KIM, Ho Seop SONG
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Publication number: 20220106035Abstract: Proposed is an airfoil wing-shaped aircraft including a body having a wing-shaped longitudinal cross-section and having an upper surface on which a shape of a concave curvature-surface portion is formed along a center axis in a streamwise direction, a fluid inlet being formed in each of the opposite lateral sides of a leading portion of the body, and a fluid output being formed in each of the opposite lateral sides of a tail portion of the body, wherein a duct connects the fluid inlet and the fluid outlet to each other.Type: ApplicationFiled: October 4, 2021Publication date: April 7, 2022Inventors: Hyung Hee CHO, Seungyeong CHOI, Jihyuk KIM, Juyeong NAM, Maroosol YUN, Taedoo YOON, Minho BANG, Joon-soo LIM
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Patent number: 10439294Abstract: A technique of adjusting absorptivity of radar waves and emissivity of infrared waves by controlling the waves of the radar and infrared regions using a structure formed of a meta-material. A composite structure for controlling absorptivity and emissivity includes: a first anti-detection unit; and a second anti-detection unit stacked on the first anti-detection unit, wherein the first anti-detection unit is an absorber for absorbing electromagnetic waves of a first range input from an outside of the first anti-detection unit, and the second anti-detection unit is a selective emitter for selectively blocking emission of electromagnetic waves of a second range and selectively allowing emission of electromagnetic waves of a third range among electromagnetic waves that can be emitted to an outside of the second anti-detection unit.Type: GrantFiled: March 8, 2017Date of Patent: October 8, 2019Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION YONSEI UNIVERSITYInventors: Hyung Hee Cho, Taehwan Kim, Hwanseong Lee, Ji-Yeul Bae, Namkyu Lee, Taeil Kim
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Publication number: 20180069319Abstract: A technique of adjusting absorptivity of radar waves and emissivity of infrared waves by controlling the waves of the radar and infrared regions using a structure formed of a meta-material. A composite structure for controlling absorptivity and emissivity includes: a first anti-detection unit; and a second anti-detection unit stacked on the first anti-detection unit, wherein the first anti-detection unit is an absorber for absorbing electromagnetic waves of a first range input from an outside of the first anti-detection unit, and the second anti-detection unit is a selective emitter for selectively blocking emission of electromagnetic waves of a second range and selectively allowing emission of electromagnetic waves of a third range among electromagnetic waves that can be emitted to an outside of the second anti-detection unit.Type: ApplicationFiled: March 8, 2017Publication date: March 8, 2018Inventors: Hyung Hee CHO, Taehwan KIM, Hwanseong LEE, Ji-Yeul BAE, Namkyu LEE, Taeil KIM