A Novel Adaptive Generation Method for Initial Guess Values of Component-Level Aero-Engine Start-Up Models

Wenxiang Zhou (), Sangwei Lu, Wenjie Kai, Jichang Wu, Chenyang Zhang and Feng Lu
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Wenxiang Zhou: Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Sangwei Lu: Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Wenjie Kai: AECC Aero Engine Control System Institute, Wuxi 214063, China
Jichang Wu: AECC Hunan Power Machinery Research Institute, Zhuzhou 412002, China
Chenyang Zhang: AECC Hunan Power Machinery Research Institute, Zhuzhou 412002, China
Feng Lu: Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Sustainability, 2023, vol. 15, issue 4, 1-25

Abstract: To solve the difficult problem of selecting initial guess values for component-level aero-engine start-up models, a novel method based on the flow-based back-calculation algorithm (FBBCA) is investigated. By exploiting the monotonic feature of low-speed aero-engine component characteristics and the principle of flow balance abided by components in the start-up process, this method traverses all the flows in each component characteristic at a given engine rotor speed. This method also limits the pressure ratios and flow rates of each component, along with the surplus power of the high-pressure rotor. Finally, a set of “fake initial values” for iterative calculation of the aero-engine start-up model can be generated and approximate true initial guess values that meet the accuracy requirement according to the Newton–Raphson iteration method. Extensive simulation verifies the low computational cost and high computational accuracy of this method as a solver for the initial guess values of the aero-engine start-up model.

Keywords: aero-engine; start-up model; flow-based back-calculation algorithm; initial guess value; low-speed component characteristics (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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