Numerical simulation simplification method for resistance reduction performance of surface microstructure of rotating blade

Abstract

The invention discloses a numerical simulation simplification method for resistance reduction performance of a surface microstructure of a rotating blade. Firstly, a computational domain is established according to an overall smooth impeller model, smooth impeller full-ring simulation is carried out, and parameters of a flow field around a blade are extracted. Secondly, an integral impeller computational domain is segmented, a single smooth blade computational domain is created. Periodic simulation is made and flow field parameters are extracted around the blades; parameters are compared twice, and the rationality of simplification from a whole loop to a single loop is ensured. The single-ring computational domain is sliced in the height direction to obtain a two-dimensional blade computational domain section, a computational domain of a single blade profile is created by stretching and local steady-state simulation is made by taking a single-ring simulation result as a condition. The local steady-state simulation structure is compared with theoretical calculation to ensure that an error is within an acceptable range, microtextures on the surface of the blades are arranged to perform local steady-state simulation. By means of the method, the flowing environment of a certain blade height position of the impeller system can be simulated, and the drag reduction characteristic of the microstructures at the position can be studied.

Description

technical field [0001] The invention relates to a method for simplifying the numerical simulation of the drag reduction performance of the micro-texture of a rotating blade, which can be used to simplify the numerical simulation steps of the micro-texture of the whole impeller, reduce the cost of simulation hardware and time, and belongs to the field of computer simulation. Background technique [0002] In order to meet the development needs of future aero-engines, the engines are being developed with the goals of high thrust-to-weight ratio, high efficiency, low fuel consumption and good stability. The impeller system is an important part of the engine, which directly affects the overall performance of the engine. In order to improve the fuel efficiency of the engine, many scholars try to apply new drag reduction technology to the surface of the blade, hoping to obtain higher aerodynamic performance of the blade. Among them, micro-textured drag reduction technology has bee...

AI Technical Summary

Problems solved by technology

However, due to the large complexity of the impeller surface and the large amount of calculations for the full-ring simulation, the requirements for computing hardware and computing time are very high. Moreover, the addition of tiny surface textures will greatly increase the difficulty of simulation.

Research on Drag Reduction Performance of Unfavorable Micro-texture on Blade Surface

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