“The work done,” Peng wrote in Chapter 3, “depends only on the change in the fluid’s whirl velocity ((V_u)) times the blade speed at inlet and outlet. The internal details—friction, recirculation—are secondary to this inviolable law.”
Turbomachinery is notoriously difficult for self-study. Discussing Peng’s end-of-chapter problems (he provides solutions to odd numbers in an appendix) helps clarify misconceptions. Fundamentals Of Turbomachinery By William W Peng
Fundamentals of Turbomachinery by William W. Peng is not a coffee table book; it is a workbook. It requires a pencil and a calculator. But if you work through the velocity triangles and the stage reaction examples, you will walk away with an intuition for rotating machinery that most engineers never develop. “The work done,” Peng wrote in Chapter 3,
For aerospace students, this is gold. Peng explains surge and rotating stall—the two killers of jet engines and industrial compressors. He uses a simple spring-mass analogy to explain why surge is a system-level instability. The chapter concludes with surge avoidance techniques: bleed valves, variable inlet guide vanes, and active control. Fundamentals of Turbomachinery by William W