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首页> 外文会议>ASME Turbo Expo: Turbomachinery Technical Conference and Exposition >MULTI-OBJECTIVE DESIGN OF A TRANSONIC TURBOCHARGER COMPRESSOR WITH REDUCED NOISE AND INCREASED EFFICIENCY
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MULTI-OBJECTIVE DESIGN OF A TRANSONIC TURBOCHARGER COMPRESSOR WITH REDUCED NOISE AND INCREASED EFFICIENCY

机译：噪声减少的跨音速涡轮增压器压缩机的多目标设计，升高效率提高

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In marine diesel engines, transonic centrifugal compressors are widely used due to their capabilities to: 1) downsize engines by increasing output power; 2) cause less fuel consumption; 3) enhance the combustion efficiency. Apart from the traditional requirements such as good choke and stall margin, high boosting pressure ratio, and high stage efficiency, it is also necessary to reduce the turbocharger noise as much as possible for a more comfortable working environment. The most effective way is to reduce the compressor noise at the source, i.e. the compressor impeller itself must produce less aerodynamic noise rather than using any silencers. In this paper, we present a redesign work for an existing impeller wheel using the 3D inverse method with an in-house aeroacoustic code. The CFD simulation-s for the compressor characteristics and internal flow field details, the numerical predictions of aeroacoustic sound e-missions, and FEA analysis for the structure integrity have all been attempted to thoroughly assess the performances of baseline and optimised impellers. The computational results found that the new impeller can lead to better performances in all three aspects, which are supported by the experimental measurements conducted for both impellers using the same test configurations. The experimental data confirmed that the inversely redesigned impeller wheel provides a wider compressor operating range, higher efficiency at large rotating speed, and a few dB(A)s lower noise emissions in the upstream radiation direction.
机译：在船用柴油发动机中，由于它们的能力广泛使用了跨音质离心式压缩机：1）通过增加输出功率降低发动机; 2）造成较少的燃料消耗; 3）增强燃烧效率。除了传统的扼流圈和失速余量等传统要求外，高升压压力比和高阶段效率，还有必要降低涡轮增压器噪音，以便更舒适的工作环境尽可能地降低涡轮增压器噪音。最有效的方法是减少源处的压缩机噪声，即压缩机叶轮本身必须产生更少的空气动力学噪声，而不是使用任何消音器。在本文中，我们使用具有内部空气声码的3D逆方法为现有的叶轮提供重新设计。 CFD仿真-S对于压缩机特性和内部流场的细节，空气声学e-ersions的数值预测，以及结构完整性的FEA分析已经尝试彻底评估基线和优化叶轮的性能。计算结果发现，新的叶轮可以在所有三个方面导致更好的性能，这是通过使用相同的测试配置的两种叶轮进行的实验测量来支持。实验数据证实，反向重新设计的叶轮提供更广泛的压缩机操作范围，较高的旋转速度效率，以及上游辐射方向的几个DB（a）的噪声排放。

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