Abstract As a key energy equipment of the compressed air storage (CAES) system, centrifugal compressor with shroud cavity is employed to avoid leakage flow from rotor, especially in high-pressure stages. In order clarify characteristics and its influences, taken as research object present work. First, across has been studied numerically, it’s found that there are negative effects on compressor’...

Yuri Biba is a Staff Aero Performance Engineer with Dresser-Rand Company, in Olean, New York. He has been with the company since 1992, involved in turbocompressor selections, revamps and testing, focusing on aerodynamic design, analysis, performance prediction, and optimization of centrifugal compressor components. Dr. Biba received his M.Sc. degree in Aeronautical Engineering (with Honors, 198...

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...

This work describes the potential consequences associated with operating a centrifugal compressor in overload. Nomenclature is offered to explain what is meant by overload operation, and methods that are used by original equipment manufacturers (OEMs) and end users to define overload limits are presented. The paper also describes the conditions that can lead to overload operation. Computational...

Most centrifugal compressors are required to operate over a broad range of flow rates and to provide a high pressure ratio with high efficiency. In order to meet these demands the application of variable geometry techniques is often considered and applied. The potential areas for the application of variable geometry procedures lie at inlet to and discharge from the impeller. This paper reviews ...

Screw compressors have the advantage of low mechanical vibration levels similar to those found in centrifugal compressors due their rotary motion. However, screw compressors are positive displacement machines with a working principle similar to reciprocating compressors, which gives screws some advantages compared to centrifugals, such as: • The suction volume flow and power consumption grow li...

This thesis addresses modeling and active surge control of a simple compression system, using only the drive system of the compressor for actuation. Theoretical results are validated by experiments on a test rig that was built as a part of this work. Control laws are derived in two stages. First all system states, such as pressure mass ‡ow and impeller speed, are assumed as available signals. A...

The rotor of a magnetic suspension centrifugal compressor is supported by bearing, and power failure will cause the high-speed to fall directly onto protective bearings, affecting reliability compressor. To solve this problem, paper proposes an abnormal shutdown control method with semi-switching modulation inverter. Firstly, overall scheme designed, its feasibility analysed in detail through m...