Abstract: A dual-fuel turbine engine is a type of turbine engine that can operate using two different fuel sources, such as liquid fuel (e.g., diesel) and natural gas. For liquid fuels, the turbine engine includes a primary line to facilitate engine startup and a secondary line to modify power output. Generally, the turbine engine only uses one type of fuel for combustion at a time. The fuel lines and passages in the fuel nozzles that carry the unused fuel source should preferably be purged and sealed by a purging system to reduce coking. However, conventional purge systems typically purge and seal only the secondary line for liquid fuels. As a result, the passages in the fuel nozzles connected to the primary line are prone to coking. To address this problem, a purge system is disclosed that purges and seals the primary line and, optionally, the secondary line.

Abstract: A torque converter includes a pump shell having pump blades; a turbine shell having a support portion supporting turbine blades, wherein the turbine blades are driven by the pump blades via a fluid to rotate about a rotational axis. The turbine shell further has a flange portion extending outward at the radially outside of the support portion and is integrally formed with the support portion. The torque converter further comprises a vibration damping device, the mass of which is mounted on the flange portion and configured to be movable relative to the flange portion and apply a torque to the turbine shell, thereby damping the torque vibration on the turbine shell. In addition, the invention also discloses a vehicle comprising the torque converter.

Abstract: Disclosed is a method for enhancing thermal energy storage performance of industrial grade hydrated salts based on phase change, comprising: heating an aqueous system of industrial grade hydrated salts containing 105-130 percent (%) by mass of m0 industrial grade hydrated salt to m0, taking a sample for differential scanning calorimeter testing and recording its melting enthalpy as ?H1; melting and adding water into, or melting and evaporating the residual aqueous system of industrial grade hydrated salts or the residual industrial grade hydrated salts system with a mass of m1 to increase or decrease the mass by 0.4-0.8% m0 until a melting enthalpy ?Hn of a sample that taken from the residual aqueous system of industrial grade hydrated salts with a mass of mn satisfies ?H2< . . . <?Hn>?Hn+1.

Abstract: A preparation method of Cu—Pd—CeO2/?-Al2O3@NP catalyst and a synthesis method of benzopyrazine compounds. The preparation method of the Cu—Pd—CeO2/?-Al2O3@NP catalyst comprises the following steps: (1) preparing a CeO2/?-Al2O3 carrier; (2) preparing a CeO2/?-Al2O3@NP carrier; (3) preparing the Cu—Pd—CeO2/?-Al2O3@NP catalyst by impregnation method. A one-pot method for synthesizing benzopyrazine compounds of formula (III) includes using an o-nitroaniline compound of formula (I) and an aliphatic diol compound of formula (II) as raw materials, carrying out the one-pot synthesis of the benzopyrazine compound of formula (III) under solvent-free condition and under the combined action of the Cu—Pd—CeO2/?-Al2O3@NP catalyst prepared by the method and an alkali. The Cu—Pd—CeO2/?-Al2O3@NP catalyst increases the number of basic sites by doping N and P, and meanwhile loads CeO2 to assist in the extraction of protons, thereby improving the dehydrogenation activity and product selectivity.

Abstract: Disclosed is a method for enhancing thermal energy storage performance of industrial grade hydrated salts based on phase change, comprising: heating an aqueous system of industrial grade hydrated salts containing 105-130 percent (%) by mass of m0 industrial grade hydrated salt to m0, taking a sample for differential scanning calorimeter testing and recording its melting enthalpy as ?H1; melting and adding water into, or melting and evaporating the residual aqueous system of industrial grade hydrated salts or the residual industrial grade hydrated salts system with a mass of m1 to increase or decrease the mass by 0.4-0.8% m0 until a melting enthalpy ?Hn of a sample that taken from the residual aqueous system of industrial grade hydrated salts with a mass of mn satisfies ?H2< . . . <?Hn>?Hn+1.

Abstract: Disclosed are methods for preparing high-purity boehmite and porous gamma-alumina nano-powder, comprising: adding aluminum isopropoxide into water and stirring the aluminum isopropoxide added water, then adding aluminum hydroxide generated by hydrolysis of high-purity aluminum powder into that stirred water, stirring that aluminum hydroxide added water to obtain a mixed system; carrying out hydrothermal reaction on the mixed system, performing centrifuging, washing, drying and crushing to the reacted mixed system, obtaining high-purity boehmite; calcining the high-purity boehmite to obtain porous gamma (?)-alumina nano-powder.

Abstract: A torque converter includes a pump shell having pump blades; a turbine shell having a support portion supporting turbine blades, wherein the turbine blades are driven by the pump blades via a fluid to rotate about a rotational axis. The turbine shell further has a flange portion extending outward at the radially outside of the support portion and is integrally formed with the support portion. The torque converter further comprises a vibration damping device, the mass of which is mounted on the flange portion and configured to be movable relative to the flange portion and apply a torque to the turbine shell, thereby damping the torque vibration on the turbine shell. In addition, the invention also discloses a vehicle comprising the torque converter.

Abstract: A system and method of monitoring vibrations, in a machine having a rotating element, where composite vibration signals are measured and filtered into discreet vector components associated with machine operating frequency. The filtered vectors are then evaluated to obtain a mean and standard deviation, whereupon a further value is obtained and compared to the prior values. Trip conditions may be set to initiate certain actions based on the meeting of the conditions. Additional data related to operating conditions of the machine may be analyzed in conjunction with the vibration data to be considered as providing a cause for vibration anomalies that may be observed. The operating, conditions of the machine may be displayed on a computer display in association with the discreet vector components, for example in a second level folder to the first level folder of the discreet vector components.

Abstract: A system and method of monitoring vibrations, in a machine having a rotating element, where composite vibration signals are measured and filtered into discreet vector components associated with machine operating frequency. The filtered vectors are then evaluated to obtain a mean and standard deviation, whereupon a further value is obtained and compared to the prior values. Trip conditions may be set to initiate certain actions based on the meeting of the conditions. Additional data related to operating conditions of the machine may be analyzed in conjunction with the vibration data to be considered as providing a cause for vibration anomalies that may be observed. The operating, conditions of the machine may be displayed on a computer display in association with the discreet vector components, for example in a second level folder to the first level folder of the discreet vector components.

Abstract: The detection of combustion anomalies within a gas turbine engine is provided. A sensor associated with a combustor of the engine measures a signal that is representative of combustion conditions. A sampled dynamic signal is divided into time segments to derive a plurality of data points. The sampled dynamic signal is transformed to a form that enables detection of whether the sensed combustion conditions within the combustor are indicative of any combustion anomalies of interest. A wavelet transform is performed to calculate wavelet coefficients for the data points and at least one region of interest is targeted. The amplitude of each wavelet coefficient within each targeted region is normalized by a baseline signal. The normalized amplitudes of the wavelet coefficients are used to determine whether any combustion anomalies have occurred by comparing the normalized amplitudes of the wavelet coefficients within each target region to a predetermined threshold amplitude.

Abstract: The detection of combustion anomalies within a gas turbine engine is provided. A sensor associated with a combustor of the engine measures a signal that is representative of combustion conditions. A sampled dynamic signal is divided into time segments to derive a plurality of data points. The sampled dynamic signal is transformed to a form that enables detection of whether the sensed combustion conditions within the combustor are indicative of any combustion anomalies of interest. A wavelet transform is performed to calculate wavelet coefficients for the data points and at least one region of interest is targeted. The amplitude of each wavelet coefficient within each targeted region is normalized by a baseline signal. The normalized amplitudes of the wavelet coefficients are used to determine whether any combustion anomalies have occurred by comparing the normalized amplitudes of the wavelet coefficients within each target region to a predetermined threshold amplitude.