何为离心式压缩机的“石墙阀”？ stone wall 以前的机组有一条这样的线，作用是用出口温度高的气体来气化段间罐的少量液体，避免液位积累频 ... stonewall 不是你说的这个意思吧，见下面的引文 16.5.2 stonewall again, consider a constant-speed compressor with fixed suction conditions. as network resistance decreases, the operating point will move along the performance curve to the right. eventually, a point of maximum flow and minimum polytropic head is encountered, beyond which further decreases in network resistance will not increase the flow rate. this is known as the choke point, or stonewall. the physical phenomenon is that the gas velocity has increased to the local acoustic velocity (therefore, mach 1) at some point in the compressor. when choke occurs, the flow rate cannot increase unless conditions change in the choked region. stonewall is not particularly damaging to single-stage centrifugal compressors but can cause serious damage to the rotors and blades of multistage centrifugal and axial compressors. in such situations, a suitably designed antichoke controller can be used to manipulate an antichoke control valve, thus maintaining sufficient system resistance to prevent choke. 查看更多
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