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首页> 外文期刊>International Journal of Heat and Fluid Flow >Steady state performance evaluation of variable geometry twin-entry turbine
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Steady state performance evaluation of variable geometry twin-entry turbine

机译：变几何双入口涡轮机稳态性能评估

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This paper presents the results from an experimental investigation conducted on different turbine designs for an automotive turbocharger. The design progression was based on a commercial nozzleless unit that was modified into a variable geometry single and twin-entry turbine. The main geometrical parameters were kept constant for all the configurations and the turbine was tested under steady flow conditions. A significant depreciation in efficiency was measured between the single and twin-entry configuration due to the mixing effects. The nozzleless unit provides the best compromise in terms of performance at different speeds. The twin-entry turbine was also tested under partial and unequal admissions. Based on the test results a method to determine the swallowing capacity under partial admission given the full admission map is presented. The test results also showed that the turbine swallowing capacity under unequal admission is linked to the full admission case.
机译：本文介绍了针对汽车涡轮增压器的不同涡轮设计进行的实验研究的结果。设计的进展是基于商业化的无喷嘴装置，该装置被改造成可变几何形状的单进双出涡轮机。对于所有配置，主要几何参数均保持恒定，并且在稳定流量条件下对涡轮进行了测试。由于混合效应，在单入口和双入口配置之间测得效率显着下降。无喷嘴单元在不同速度下的性能方面可提供最佳折衷。双入口涡轮机也接受了部分和不平等的进气测试。根据测试结果，提出了一种在给定完整入场图的情况下确定部分入场下吞咽能力的方法。测试结果还表明，不平等进气情况下的涡轮吞咽能力与全进气情况有关。

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