Theoretical and experimental evaluation of temperature drop and power consumption in a cover-plate pre-swirl system for gas turbine cooling

Liu, Gaowen; Gong, Wenbin; Wu, Heng; Pang, Liangwei; Lin, Aqiang

doi:10.1016/j.csite.2021.101221

Cited by 18 publications

(2 citation statements)

References 26 publications

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“…The transmission efficiency and lubrication state of the gearbox are the technical indicators that affect the performance of the whole machine and have an important impact on the power, economy and environmental performance. Planetary gear transmission has its unique characteristics under the same conditions as part material, machining accuracy and working environment [4][5][6]. Especially for transmission devices such as machine tools that require small size, light weight, compact structure and high transmission efficiency, planetary gear transmission has been more and more widely used.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Quality of the Automatic Transmission Shift and the Power Transmission Characteristics

Zhang

Liu

2022

Energies

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We have established a simulation platform for the machine–electro-hydraulic coupling system of the transmission system and the control system to study the root causes of the problems of large shifting impact and slow change of the machine tool transmission system. The dynamic analysis of the gear shift work of the gearbox was carried out, and the main factors affecting its shift instability were studied. With the impact and sliding power as the optimization goals, the shift quality is optimized based on the multi-objective genetic algorithm. Through the shift experiment, it was found that the power interruption phenomenon during the shift process was eliminated after optimization, and the quality of the shift was improved. Simulated planetary row wheel gear meshing force was found in the same gear, and the second planetary row gear meshing force was the largest among the planetary rows. The stress of the node near the top of the tooth is greater than the stress of the node near the node circle and the root of the tooth, and the two sides of the tooth top are relatively larger than the intermediate stress. The dynamic simulation model of the planetary gearbox system with rigid–soft hybrid can obtain the stress distribution of the solar wheel at the maximum impact moment and the stationary stage, as well as the dynamic stress of the key nodes of the solar wheel, which lays the foundation for the fatigue strength and life prediction of the gear system.

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Section: Introductionmentioning

confidence: 99%

Optimization of the Quality of the Automatic Transmission Shift and the Power Transmission Characteristics

Zhang

Liu

2022

Energies

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“…The non-uniform contact thermal resistance of the connection interface has an important influence on the temperature distribution of the flange structure. In particular, the thermal problem of high temperature is always a hot topic in engine research [13,14]. Due to the high gas temperature inside the aero-engine, for the casing, the mechanical conditions of the flange mounting edge are very complicated under the action of mechanical load, thermal load, and aerodynamic load.…”

Section: Introductionmentioning

confidence: 99%

Effect Mechanism and Performance Evaluation of Flange Contact Thermal Resistance in an Aero-Engine

Chen

Chu

2022

Aerospace

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According to the discontinuous structural characteristics of a gas turbine, by considering the contact thermal resistance of the rough surface, a contact thermal resistance measurement experiment was conducted in this study. The main objectives of this work were to investigate the influence mechanism and change law of the contact thermal resistance characteristics on flange installation. Furthermore, this study conducted a theoretical analysis of contact thermal resistance and the calculation of a typical flange mounting edge based on actual operating conditions. The research results show that the contact thermal resistance of a typical flange mounting edge increases with an increase in flange clearance under different tightening torques, which is essentially proportional to the flange clearance. As the flange clearance increases, the unit contact thermal conductivity firstly decreases rapidly. Then, as the flange clearance reaches 0.4 mm, the decreasing rate of unit contact thermal conductivity tends to flatten. In addition, the contact thermal resistance of the typical flange mounting edge decreases with the increase in the tightening torque under different flange clearances. Furthermore, the contact area ratio is not related to the material, and the contact thermal resistance under actual working conditions can be calculated using the unit contact area.

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Investigation on the Similarity Criterion Numbers of Flow and Heat Transfer Characteristics in a High-Speed Rotor-Stator Disk Cavity of Aero-Engine

Chang,

Lei,

Lin

et al. 2023

Lecture Notes in Mechanical Engineering

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Theoretical and experimental evaluation of temperature drop and power consumption in a cover-plate pre-swirl system for gas turbine cooling

Cited by 18 publications

References 26 publications

Optimization of the Quality of the Automatic Transmission Shift and the Power Transmission Characteristics

Optimization of the Quality of the Automatic Transmission Shift and the Power Transmission Characteristics

Effect Mechanism and Performance Evaluation of Flange Contact Thermal Resistance in an Aero-Engine

Investigation on the Similarity Criterion Numbers of Flow and Heat Transfer Characteristics in a High-Speed Rotor-Stator Disk Cavity of Aero-Engine

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