High-efficiency low-noise elbow based on joint control of cross-sectional shape and turning radius and design method

Abstract

The application discloses a kind of high-efficiency low-noise elbow based on section shape and steering radius joint control, the inlet end surface and outlet end surface of the elbow are both elliptical structure, and the inlet elliptical section parameter is equal to its outlet elliptical section parameter;Elbow steering angle is 90°;The elliptical section eccentricity of the described is valued (0,1), and the steering radius of elbow is valued in the range of 0.5D1~2D1.Elbow design method is under the condition of keeping the cross-sectional area of elbow unchanged, by controlling the parameters when the cross section of elbow changes from circular to elliptical, i.e., the eccentricity e of cross-sectional ellipse and the steering radius R of elbow, the sound pressure intensity of flow noise obtained by simulation calculation, pressure fluctuation intensity and entropy production are joint optimization objectives, the elbow is optimized and iterated, a set of optimal high-efficiency low-noise elbow design parameters are found to realize the application requirements of less energy loss, weak pressure fluctuation intensity and low noise.

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