带有阶梯叶轮出口的双参数输出压气机设计
发布时间：2018-11-02 10:18
【摘要】：为了解决平原汽车在高原行驶时功率下降问题,提出了一种用于恢复高原柴油机功率的燃气涡轮辅助增压系统,该系统由燃烧室、压气机、涡轮、点火装置、喷油器、控制系统等辅助装置组成,燃气涡轮辅助增压系统的压气机要分别对燃烧室和原车柴油发动机供气,需要两种不同压比的空气。为满足上述要求设计了一种带有阶梯型叶轮和准流线型分隔式扩压器的压气机;并以某柴油机为例进行了计算分析,得到了初步的设计参数和工作参数;设计出切割前的高压比叶轮,对高压叶轮内部流场进行数值模拟计算,得到相应气动参数;通过计算结果分析叶轮出口流量分布和速度分布确定阶梯型叶轮出口参数和准流线型分隔板的形状,设计出准流线型阶梯叶轮。
[Abstract]:In order to solve the problem of decreasing power of plain vehicles at high altitude, a gas turbine auxiliary turbocharging system used to restore the power of plateau diesel engines is proposed. The system consists of combustor, compressor, turbine, igniter, injector, etc. The compressor of the gas turbine auxiliary turbocharging system needs two kinds of air with different pressure ratio to supply gas to the combustion chamber and the diesel engine of the original vehicle respectively. In order to meet the above requirements, a compressor with step impeller and quasi streamline diffuser is designed, and the calculation and analysis of a diesel engine are carried out, and the preliminary design parameters and working parameters are obtained. The high pressure ratio impeller before cutting is designed and the flow field inside the high pressure impeller is numerically simulated and the corresponding aerodynamic parameters are obtained. By analyzing the flow distribution and velocity distribution at the outlet of the impeller, the exit parameters and the shape of the quasi streamline separator are determined, and the quasi streamline stepped impeller is designed.
【作者单位】： 北京理工大学机械与车辆学院;北京石油化工学院机械工程学院;
【分类号】：U464.135
本文编号：2305741
[Abstract]:In order to solve the problem of decreasing power of plain vehicles at high altitude, a gas turbine auxiliary turbocharging system used to restore the power of plateau diesel engines is proposed. The system consists of combustor, compressor, turbine, igniter, injector, etc. The compressor of the gas turbine auxiliary turbocharging system needs two kinds of air with different pressure ratio to supply gas to the combustion chamber and the diesel engine of the original vehicle respectively. In order to meet the above requirements, a compressor with step impeller and quasi streamline diffuser is designed, and the calculation and analysis of a diesel engine are carried out, and the preliminary design parameters and working parameters are obtained. The high pressure ratio impeller before cutting is designed and the flow field inside the high pressure impeller is numerically simulated and the corresponding aerodynamic parameters are obtained. By analyzing the flow distribution and velocity distribution at the outlet of the impeller, the exit parameters and the shape of the quasi streamline separator are determined, and the quasi streamline stepped impeller is designed.
【作者单位】： 北京理工大学机械与车辆学院;北京石油化工学院机械工程学院;
【分类号】：U464.135
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