论文部分内容阅读
1.前言本文在上篇(第1部分)介绍的基础上,对由闭式叶轮和无叶扩压器组成的压气机的计算值和实测值进行了对比,从而明确了离心式压气机性能预测方法的可用性、适用范围和存在的问题。 2.试验装置(图1) 3.供试压气机(表1) 4.试验结果与分析有关系数和假定如下: (1) 取进气管损失系数C_0=0。 (2) 对于7号叶轮,C_(m1t)/C_(m1)=C_(m1)/C_(m1h)=1.05,其它叶轮该值均取为1.1。 (3) 叶轮摩擦系数C_f=0.005～0.0055。 (4) 求叶轮的减速损失时的W_(max)和W_(min)轮盖和轮毂表面用叶间的平均值,叶面表面用子午面平均流线上的值。
1. Introduction This paper compares the calculated and measured values of a compressor consisting of a closed impeller and a vaneless diffuser based on the introduction in Part 1 to clarify the performance of centrifugal compressors The availability of the forecasting method, the scope of application and the existing problems. 2. Test Equipment (Figure 1) 3. Test Compressor (Table 1) 4. Test Results and Analysis The relevant coefficients and assumptions are as follows: (1) Take the tracheal loss coefficient C_0 = 0. (2) C_ (m1t) / C_ (m1) = C_ (m1) / C_ (m1h) = 1.05 for the No. 7 impeller, and the values for the other impellers are all taken as 1.1. (3) impeller friction coefficient C_f = 0.005 ~ 0.0055. (4) Find the values of W max (max) and W min (min) of the wheel cover and the hub surface with the mean inter-leaf area and the meridional mean streamline of the surface of the foliage when calculating the deceleration loss of the impeller.