Abstract
The female/male screw rotor profile design for a twin screw compressor poses challenges such as frequent parameter modification and a difficult-to-build performance test platform, which affect the efficiency of a rotor profile design. To address these problems, a new idea of applying a B-spline curve to a twin screw compressor rotor profile design is proposed in this article. In addition, the design result underwent fluid simulation based on fluid dynamics technology. This method overcomes the aforementioned challenges. As a meshing line has one-to-one mapping relationship with the rotor profile and reflects important performance parameters of the rotor profile, the method of deducing female and male rotor profiles for a twin screw compressor from a meshing line is proposed. Furthermore, the B-spline curve is used as a composition curve of the meshing line to achieve fast local adjustment of the rotor tooth profile. Based on existing rotor profiles, a meshing line is designed via the B-spline curve, and female and male rotor profiles are derived in reverse. The final rotor profile underwent fluid simulation via computational fluid dynamics analysis under various conditions to analyze the pattern of the internal flow field, which is compared with the results from conventional design.
Highlights
Twin screw compressors are deployed in many industries that require high performance, low noise, and high efficiency.[1]
Computational fluid dynamics (CFD) analysis for twin screw compressors is a viable substitute for these processes
To prove the validity and reliability of the proposed reverse design of rotor profiles based on a B-spline curve, in this article, a screw air compressor produced by a Sino-German joint venture was used as the study subject; its rotor center-to-center spacing is H = 100 mm, transmission ratio is i = 5/6, and male rotor initial rotation angle is u = 488
Summary
Twin screw compressors are deployed in many industries that require high performance, low noise, and high efficiency.[1]. To prove the validity and reliability of the proposed reverse design of rotor profiles based on a B-spline curve, in this article, a screw air compressor produced by a Sino-German joint venture was used as the study subject; its rotor center-to-center spacing is H = 100 mm, transmission ratio is i = 5/6, and male rotor initial rotation angle is u = 488.
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