Article history: Received 10 June 2014 Received in revised form 29 January 2015 Accepted 3 February 2015 Available online 7 February 2015 In this paper we investigate the instabilities arising in a flow through a compressor passage using BiGlobal stability analysis. The adopted geometry comes from the results of previous experimental and numerical investigations on a linear low-pressure (LP) co...

This paper shows a prototype of miniature compressor driven by moving magnetic linear actuator . Based on the prototype, the dynamics of the piston and the capacity of the compressor are analyzed, which include electromagnetic field and mechanical vibration behaviors. The theoretical results are compared with some experimental results, some problems are discussed for improving the miniature mac...

– The paper describes design and optimisation of a tubular moving-iron linear permanent magnet motor for reciprocating compressor using finite element. The four leading design parameters are optimised individually. To validate the process reaches an optimal design, two leading parameters are varied simultaneously. This is due to one parameter may influence other parameters. The linear motor is ...

In this paper, an investigation into the effect of explicit non-linear turbulence modelling on anisotropic flows is presented. Such are typified in corner separations turbomachinery. The commonly used Reynolds-Averaged Navier-Stokes (RANS) closures, which Reynolds stress tensor modelled by Boussinesq (linear) constitutive relation with mean strain-rate tensor, often struggle to predict separati...

High orders of end use efficiency and reliability have been achieved in a refrigeration compressor which employs an electromagnetic linear motor. Techniques of computer-aided design were used to explore the operational characteristics of the moving-iron compressor and to simulate its operation. Application tests on prototype units developed through extensive feasibility and manufacturing studie...

The paper describes design and optimisation of a tubular moving-iron linear permanent magnet motor for reciprocating compressor using finite element. The four leading design parameters are optimised individually. To validate the process reaches an optimal design, two leading parameters are varied simultaneously. This is due to one parameter may influence other parameters. The linear motor is ai...

This thesis presents a simple, meanline analysis of the impact of blade roughness on the mass flow, work coefficient, and efficiency of a three-stage axial compressor as a function of the location of fouling. First, an extensive review is presented on the state-ofthe-art of measuring compressor degradation and on the impact of roughness on loss and deviation in a compressor cascade. The perform...

In this paper we develop linear, fixed-order (i.e., fulland reduced-order) pressure rise feedback dynamic compensators for axial flow compressors. Unlike the nonlinear static controllers proposed in the literature possessing gain at all frequencies, the proposed dynamic compensators explicitly account for compressor performance versus sensor accuracy, compressor performance versus processor thr...

Abstract Experimental results of a transonic compressor blade pressure loadings and shaft torque measurements are presented in this paper. Data were acquired for the cascade middle being set to number incidence angle offsets simulate phases flutter oscillatory motion. This paper should be viewed as progress report on ongoing larger research effort flow regimes.