Compressor and Throttle Characteristics for Models

Abstract

Turbocharger is a device used for compression of gases of different features. I tis a conversion of kinetic energy or mechanical energy into pressure. Compressed media can be vary from pure gases such as hydrogen, oxygen, noble gases to the gas mixtures such as air, a mixture, of hydrogen and others. Gas composition is very important because of its physical and chemical properties depends on many parameters of compressor design [. The basis of modelling surge dynamics of centrifugal compressors is Greitzerov nonlinear model. This article is getting the gear characteristics of the mass flow and pressure increase passing compression system. Another challenge is getting the throttle characteristic mass flow and pressure drop on the throttling valve. These characteristics are necessary for modelling the dynamic model of a centrifugal compressor according Greitzer (1976). For getting these characteristics, it is necessary to know the data of the measurements. Data can be extracted from a manufacturer. One of the most important graphs is compressor characteristic, known as the compressor map.

Modeling and Control of Compression System

“…∆ (0, ) indicates, that = 0 [10]. Complete derivation of the compressor, throttle and control charactersitcs can be found in Smolarik (2013) [11].…”