雙段離心式冷媒壓縮機流固耦合模擬分析

Numerical Simulation and Analysis of Fluid-Structure Interaction for a Two-Stage Centrifugal Refrigeration Compressor

翁英哲 ； 吳登淵 ； 楊竣翔

《機械工業雜誌》 474期 (2022/09) Pp. 45-53

摘要

本文使用商用設計軟體CFturbo設計雙段離心式冷媒壓縮機之流力元件與數值計算軟體ANSYS-Fluent與ANSYS-Structure模擬雙向流固耦合壓縮機結構受力現象。雙段冷媒壓縮機由含導葉進氣入口、2顆離心葉輪、無葉擴散器與渦殼組合而成。CFturbo為設計壓縮機主要的流力元件幾何外形，包含葉輪入出口大小、葉片厚度、葉輪直徑、葉輪厚度、葉片數、擴散器與入口導葉。ANSYS-Fluent為分析流體由入口經過葉輪至擴散器與渦殼作用在流力元件結構上之受力現象，與ANSYS-Structure靜態頻譜分析後，將兩結果耦合得出壓縮機結構變形量與應力。數值分析結果壓縮機皆在安全範圍內運轉。

關鍵字

流固耦合 ； 壓縮機 ； 變形

並列摘要

This article numerically investigates the two-way fluid-structure interaction (FSI) of a two-stage centrifugal refrigeration compressor by using the commercial design software CFturbo and the computation fluid dynamics software ANSYS-Fluent and ANSYS-Structure. The two-stage centrifugal refrigeration compressor is composed of an inlet with guide vanes, two centrifugal impellers, a vaneless diffuser and the volute. The CFturbo software package is utilized to design the geometry of the main flow components of the compressor, including the size of the inlet and outlet of the impeller, the diameter of the impeller, the thickness of the blade, the number of blades, the diffuser and the inlet guide vane. The fluid simulation software ANSYS-Fluent is used to analyze the force being applied from flow through the inlet guide vanes of the impeller, to the vaneless diffuser and the volute, and the structural analysis software ANSYS-Structure is utilized for the spectrum analysis of the compressor's components. The numerical analysis obtained the deformation and stress of the refrigeration compressor and the results show that the compressor always operated within the safe range.

並列關鍵字

Fluid-structure interaction ； Compressor ； Deformation

參考文獻

JARN, https://www.ejarn.com/detail.php?id=57104&l_id=1

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