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首页> 外文期刊>International Journal of Heat and Fluid Flow >Numerical and experimental analysis of automotive turbocharger compressor aeroacoustics at different operating conditions
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Numerical and experimental analysis of automotive turbocharger compressor aeroacoustics at different operating conditions

机译：不同工况下汽车涡轮增压压缩机空气声学的数值和实验分析

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Centrifugal compressor aeroacoustics are analyzed by means of a three-dimensional CFD model. Three operating points at nominal compressor speed are simulated ranging from best efficiency point to near surge conditions. Experimental measurements are obtained using a steady flow rig mounted on an anechoic chamber. URANS and DES predictions of compressor global variables and pressure spectra are compared against experimental measurements. Flow-induced noise increases as the operating point moves toward surge line. Stall at the suction side of the blades exists even for high mass flow conditions, causing a high frequency boundary layer oscillation. Low momentum cells rotating at the diffuser are found at points closer to surge, causing the so-called whoosh noise. Inducer rotating stall is also present at these conditions. Point closest to surge shows a rotating tornado-type vortex at the inducer, determining a moving low pressure region that increases low frequency noise content. (C) 2016 Elsevier Inc. All rights reserved.
机译：通过三维CFD模型分析离心压缩机的气动声学。模拟了压缩机额定转速下的三个工作点，范围从最佳效率点到接近喘振状态。使用安装在消声室上的稳定流动装置获得实验测量值。将URANS和DES对压缩机整体变量和压力谱的预测与实验测量值进行比较。当工作点移向喘振线时，流动引起的噪声增加。即使在高质量流量条件下，叶片的吸入侧也会出现失速，从而引起高频边界层振荡。在靠近扩散器的点处发现在扩散器处旋转的低动量单元，从而导致所谓的“嗡嗡声”。在这些条件下也存在感应器旋转失速。最接近浪涌的点在感应器处显示旋转的龙卷风型旋涡，确定了增加低频噪声含量的移动低压区域。 （C）2016 Elsevier Inc.保留所有权利。

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