Patents by Inventor Vishnu R UNNI

Vishnu R UNNI 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).

  • Patent number: 10895382
    Abstract: The invention discloses a system for effecting a control strategy in a reactive flow field of a turbulent flow system. The system is configured to analyze flow field properties such as velocity, heat release rate, or mixture fraction of a device during the onset of the oscillatory instability using measures from complex network theory such as betweenness centrality, degree, or closeness. The system identifies critical regions in the flow field responsible for the oscillatory instability. Further, the system also identifies optimal control strategies to avoid the onset of oscillatory instabilities by analyzing the relative strength of various network parameters and thereby controlling oscillatory instabilities which are detrimental to the fluid dynamic system. The disclosed method and system provide for optimization of control of oscillatory instabilities in fluid dynamic systems.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: January 19, 2021
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IIT MADRAS)
    Inventors: Vishnu R. Unni, Sujith Ramanpillai Indusekharan Nair, Abin Krishnan, Norbert Marwan, Jürgen Kurths
  • Publication number: 20190264916
    Abstract: The invention discloses a system for effecting a control strategy in a reactive flow field of a turbulent flow system. The system is configured to analyze flow field properties such as velocity, heat release rate, or mixture fraction of a device during the onset of the oscillatory instability using measures from complex network theory such as betweenness centrality, degree, or closeness. The system identifies critical regions in the flow field responsible for the oscillatory instability. Further, the system also identifies optimal control strategies to avoid the onset of oscillatory instabilities by analyzing the relative strength of various network parameters and thereby controlling oscillatory instabilities which are detrimental to the fluid dynamic system. The disclosed method and system provide for optimization of control of oscillatory instabilities in fluid dynamic systems.
    Type: Application
    Filed: February 27, 2019
    Publication date: August 29, 2019
    Inventors: VISHNU R. UNNI, SUJITH RAMANPILLAI INDUSEKHARAN NAIR, ABIN KRISHNAN, NORBERT MARWAN, JÜRGEN KURTHS
  • Patent number: 10337414
    Abstract: The invention includes a method for predicting the operational state of equipment with turbulent flow characterized by time series data relating to its operation. The invention further includes a system and method for predicting the onset of an impending oscillatory instability. Further, the invention includes a system and method for identifying an impending absorbing transition such as flame blowout in combustion systems. A variable representing the dynamics of operation is measured with the help of a sensor, to obtain time series data. A complex network is then derived from the measured time series data. Network properties are then calculated using the complex network to identify the state of stability relating to operation of the equipment. The stability information may include one of thermoacoustic instability, aero-elastic instability such as flutter, flow-induced vibration, magneto-hydrodynamic, aerodynamic, aeromechanical, aero-acoustic instability or onset of flame blowout of a combustor.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: July 2, 2019
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY, MADRAS (IITM)
    Inventors: Meenatchidevi Murugesan, Vishnu R Unni, Vineeth Nair Vinod, Sujith Raman Pillai Indusekharan Nair
  • Publication number: 20170051683
    Abstract: The invention includes a method for predicting the operational state of equipment with turbulent flow characterized by time series data relating to its operation. The invention further includes a system and method for predicting the onset of an impending oscillatory instability. Further, the invention includes a system and method for identifying an impending absorbing transition such as flame blowout in combustion systems. A variable representing the dynamics of operation is measured with the help of a sensor, to obtain time series data. A complex network is then derived from the measured time series data. Network properties are then calculated using the complex network to identify the state of stability relating to operation of the equipment. The stability information may include one of thermoacoustic instability, aero-elastic instability such as flutter, flow-induced vibration, magneto-hydrodynamic, aerodynamic, aeromechanical, aero-acoustic instability or onset of flame blowout of a combustor.
    Type: Application
    Filed: April 27, 2015
    Publication date: February 23, 2017
    Applicant: INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventors: Meenatchidevi MURUGESAN, Vishnu R UNNI, Vineeth NAIR VINOD, Sujith RAMAN PILLAI INDUSEKHARAN NAIR