Selection of each major type of Reciprocating, Rotary, Centrifugal and axial Compressor is briefly reviewed. It ls explained how the nondimensional scales of Specific Speed and Speclfic Diameter can be used to select any of the above configuration of Compression machinery at its optimum efficiency range. The paper presents the approach of Engineers Constructors in selecting compressors in petro...

A four-blade-passage numerical model was developed for a two-stage axial-flow compressor with an inlet guide vane (IGV) the purpose of studying steady and dynamic characteristics approaching its stability limit. The flow-field information indicated that tip-leakage flow decreased more rapidly from blade’s leading edge to trailing edge, decreasing rate. leakage verified be driven via blade load ...

This paper analyzes the nonlinear phenomenon of rotating stall via the methods of projection [Elementary Stability and Bifurcation Theory, G. Iooss and D. D. Joseph, Springer-Verlag, 1980] and Lyapunov [J.-H. Fu, Math. Control Signal Systems, 7, 255278, 1994]. A compressor model of Moore and Greitzer is adopted in which rotating stall dynamics are associated with Hopf bifurcations. Local stabil...

Power enhancement technologies for gas turbines such as inlet fogging, interstage water injection, saturation cooling, inlet chillers, and combustor injection are being used by end users without evaluating the potentially negative effects these devices may have on the operational integrity of the gas turbine. Specifically, the effect of these add-on devices, off-design operating conditions, non...

Abstract Improvement of the operating range compressors will help power and energy plant to work more flexibly integrate with other generation systems. The stall, rotating resulting surge are most dominant limiting phenomenon in axial compressor envelop. Several active passive methods have been employed eliminate occurring these phenomena extend compressors’ stable range. Among these, casing tr...