Characterization of two-stage turbine system under steady and pulsating flow conditions
Characterization of two-stage turbine system under steady and pulsating flow conditions
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稳态和脉动流条件下两级涡轮系统的特性
DOI：
10.1016/j.energy.2018.01.125
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发表时间：
2018-04
期刊：
影响因子：
9
通讯作者：
Wu Yonghui
中科院分区：
文献类型：
--
作者：
Zhao Rongchao;Li Weihua;Zhuge Weilin;Zhang Yangjun;Yin Yong;Wu Yonghui
As the development of turbocompounding and two-stage turbocharging technology, there are increasingly more two-stage turbine systems applied on vehicles. The two-stage turbine recovers waste heat from the exhaust and thus affects the engine performance significantly. However, the interaction pattern and mechanism between the two turbines have not been fully understood. The paper focuses on the characteristic of the two-stage turbine under steady and pulsating flows.Firstly, an analytical model for two-stage turbine is developed to investigate the relationships between the turbines load split and equivalent area ratio under steady condition. The pattern of the load split between the high pressure turbine (HPT) and low pressure turbine (LPT) is disclosed by the model and verified by experimental data.Second, the impact of pulse frequency and amplitude on the two-stage turbine unsteady characteristic is studied by 3D computational fluid dynamics. As frequency increases, the peak values of the HPT expansion ratio and rotor torque increase drastically while those of LPT change little. As the pulse amplitude increases, the cycle-averaged expansion ratio of HPT decreases while that of LPT increases. The cycle-averaged rotor efficiencies of HPT and LPT reduce 3.7% and 8.1% respectively under 1.6 A amplitude condition, when compared with steady condition. In order to understand the phenomenon, the reasons are also discussed in detail in the paper.
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影响因子：
10.4
作者：
Padzillah, M. H.;Rajoo, S.;Martinez-Botas, R. F.
通讯作者：
Martinez-Botas, R. F.
影响因子：
9
作者：
Rajoo, Srithar;Romagnoli, Alessandro;Martinez-Botas, Ricardo F.
通讯作者：
Martinez-Botas, Ricardo F.
影响因子：
6.4
作者：
Rongchao Zhao;W. Zhuge;Yangjun Zhang;Yong Yin;Zhen Chen;Zhigang Li
通讯作者：
Rongchao Zhao;W. Zhuge;Yangjun Zhang;Yong Yin;Zhen Chen;Zhigang Li
DOI：
10.1177/0954407014535919
发表时间：
2014-07
期刊：
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
影响因子：
--
作者：
Xin Shi;Tengteng Wang;Chaochen Ma
通讯作者：
Xin Shi;Tengteng Wang;Chaochen Ma
DOI：
10.1115/gt2004-53612
发表时间：
2004
期刊：
--
影响因子：
--
作者：
T. Behr;L. Porreca;T. Mokulys;A. Kalfas;R. Abhari
通讯作者：
T. Behr;L. Porreca;T. Mokulys;A. Kalfas;R. Abhari