Modeling method of aerodynamic performance model decoupled from engine
A model modeling and engine technology, applied in instruments, geometric CAD, electrical and digital data processing, etc., can solve problems such as low efficiency and accuracy, not considering intake overflow correction and engine jet flow correction, etc., to improve computational efficiency and the effect of precision
Pending Publication Date: 2022-05-27
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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Problems solved by technology
Most of the aerodynamic models currently used for flight performance calculations do not take into account intake overflow correction and engine jet correction, and have problems of low efficiency and accuracy
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[0028] In order to make the objectives, technical solutions and advantages of the implementation of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. Throughout the drawings, the same or similar reference numbers refer to the same or similar elements or elements having the same or similar functions. The described embodiments are some, but not all, embodiments of the present application. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the present application, but should not be construed as a limitation to the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present...
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The invention belongs to the technical field of engine modeling, and particularly relates to a modeling method of an aerodynamic performance model decoupled from an engine. The method comprises the following steps: S1, based on a given flight state, aircraft overall parameters and aircraft state parameters, acquiring aerodynamic data which are not trimmed in a current state; s2, giving a group of engine thrust, elevator deflection angle and aircraft weight initial value; s3, calculating additional force and additional torque generated by overflow correction of the air inlet channel; s4, calculating additional force and additional torque generated by engine jet flow correction; and S5, based on the untrimmed aerodynamic force data, the engine thrust, the air inlet overflow correction additional force and torque, the engine jet direct force and torque, the engine jet correction additional force and torque and the gravity of the aircraft, force and torque balance is solved according to the engine state, and a trimming aerodynamic coefficient and an elevator deflection angle are output. The calculation efficiency and precision of the flight performance of the aircraft are improved.
Description
technical field [0001] The application belongs to the technical field of engine modeling, and in particular relates to a modeling method for an aerodynamic performance model decoupled from an engine. Background technique [0002] The calculation of aircraft flight performance requires accurate aerodynamic models and engine models, and the model accuracy plays a key role in the calculation results of flight performance. For example, in the second issue of Aeronautical Engineering Progress in 2010, Zhang Shengwei et al. proposed an engineering algorithm for calculating the aerodynamic trim loss in "Research on the calculation method of aerodynamic trim and trim loss". At present, most of the aerodynamic models used for flight performance calculation do not take into account the correction of intake overflow and engine jet flow, and there are problems of low efficiency and accuracy. SUMMARY OF THE INVENTION [0003] In order to solve the above problems, the present applicati...
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Login to View More IPC IPC(8): G06F30/15G06F30/17G06F119/14
CPCG06F30/15G06F30/17G06F2119/14Y02T90/00
Inventor 黄卫平卢长谦卢元杰
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA