A Mixed Dimensional Simulation Method for Propeller and Engine

Abstract

The invention discloses a propeller-engine mixed-dimensional simulation method, which relates to a numerical simulation method. Aiming at the present situation of numerical simulation of propeller and engine, a hybrid dimensional simulation method combining one-dimensional and three-dimensional numerical simulation of propeller and one-dimensional performance analysis of engine is proposed. By constructing two balance equations of flow and power balance between propeller and engine , realize the mixed dimensional simulation of 3D propeller and 1D engine. Combining the three-dimensional numerical simulation of the propeller with the one-dimensional overall performance simulation of the engine, compared with the traditional one-dimensional propeller and engine aerodynamic characteristics simulation, the aerodynamic stability analysis of the propeller to the engine can be achieved, and can be obtained in the process of mutual iteration More accurate propeller and engine numerical simulation results avoid unnecessary loss of manpower, material resources, economy and time during the integrated test of propeller and engine.

Description

technical field [0001] The invention relates to a numerical simulation method, in particular to a mixed dimension simulation method of a propeller and an engine. Background technique [0002] Turboprop (referred to as turboprop) engine is an aerodynamic device that mainly relies on the propeller to generate pull or thrust to drive the aircraft, and is suitable for aircraft with a medium flight speed (400-800km / h). Compared with aviation piston engines, turboprop engines have the advantages of large power-to-weight ratio, small windward area, and small vibration, especially as the flight altitude increases, their performance is superior; compared with turbojet and turbofan engines , it also has the advantages of low fuel consumption and high take-off thrust. Due to the advantages of mature technology, high reliability and low fuel consumption of the turboprop engine, most of the regional aircraft, general aviation aircraft and almost all civil aircraft developed in my countr...

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Problems solved by technology

[0004] At present, in terms of numerical simulation research, considering that the engine can only carry out one-dimensional overall performance analysis at this stage, because of the aerodynamic interference problem of the propeller / engine, there are two main ways to solve it: ① Combining the one-dimensional aerodynamic characteristics of the propeller with the Combined with the overall performance analysis of the one-dimensional engine, the study of aerodynamic interference is carried out from the perspective of one-dimensional analysis. However, due to the obvious three-dimensional characteristics of the propeller wake, the pressure and temperature spatial distortion characteristics brought about by the three-dimensional flow cannot be reflected in the one-dimensional analysis; ② Combining the three-dimensional propeller numerical simulation with the overall performance of the one-dimensional engine, and analyzing the flow field characteristics of the engine inlet section, the impact analysis of the propeller on the engine performance and stability has been realized, but the influence of engine state changes on the three-dimensional simulation of the propeller has not been considered yet analyze

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