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压气机和涡轮工作流动模型化是依据下列两种假设;1.工作气体是一种恒定比热的理想气体;2.这种气体的热力变化是绝热的。如果这两种假设在压缩比或膨胀比低而性能高的装置中是适用的话,那么,在对压比较高的小型装置进行研究时,所出现的误差则是不容忽视的。特别是中等功率的柴油机涡轮增压器尤为显著。 本文所介绍的模型使用简单,相比之下,初级模型的缺点是显而易见的。按照所采用的工作假设,给出了一台装置的等熵效率的几种基本概念。尤其是,根据这种效率的定义,其中某些实验数值显然高于1。考虑到这些新的因素,重新确定了涡轮进口气体温度方程和涡轮增压器工作的主要参数。
The compressor and turbine work flow modeling is based on the following two assumptions: 1. The working gas is an ideal gas with a constant specific heat; 2. The thermal variation of this gas is adiabatic. If these two assumptions apply to devices with high compression ratio or low expansion ratio and high performance, the error that can be observed when researching small devices with high pressure is not negligible. Especially medium-power diesel turbochargers are particularly significant. The model described in this article is easy to use, as opposed to the obvious drawbacks of the primary model. According to the working assumption, several basic concepts of isentropic efficiency of a device are given. In particular, some of these experimental values are clearly above 1, based on the definition of efficiency. Taking these new factors into consideration, the main parameters of turbine inlet gas temperature equation and turbocharger operation are redefined.