To reveal the mechanisms underlying effect of self-circulating casing treatment with different circumferential coverage ratios on stability axial compressor, a three-dimensional unsteady numerical was hereby conducted Rotor 35. The 20%, 40%, 60%, and 80% were designed, respectively. calculated results point out that all schemes effectively expand stable working range compressor expansion is pos...

Aero-engine core compressor preliminary design strategy has been successfully applied to the advanced of gas turbines compressors. However, few researchers have addressed application aero-engine in optimal industrial process Here we embedded into a method, which six types parameters widely used define configuration, i.e., aspect ratio, solidity, reaction, rotation speed, outlet axial Mach numbe...

Back-to-back testing has been done using NASA fan rotor 67 in the Glenn Research Center W8 Axial Compressor Test Facility. The rotor was baseline tested with a normal industrial RMS surface finish of 0.5-0.6 μm (20-24 microinches) at 60, 80 and 100% of design speed. At design speed the tip relative Mach number was 1.38. The blades were then removed from the facility and ultrapolished to a surfa...

Based on Moore and Greitzer’s model [15], the surge behavior of axial flow compression system was found to be attributed to the appearance of Andronov-Hopf bifurcationin [12]. In this paper, we focus on the design of control law to prevent and/or delay the occurrence of the bifurcations, which will then suppress the surge behavior. Both types of linear dynamic state feedback and linear washout ...

The scroll compressor incorporates new construction concepts and is quite different from other types of compressor. This unique and simple compression mechanism has a number of advantages such as small size, light weight, high efficiency, long life, and quiet operation. The compliant mechanism is one of the key ways to improve the performance and reliability of scroll compressors. The concept o...

This paper describes the introduction of three-dimension (3-D) blade designs into a 5-stage axial compressor with multi-stage computational fluid dynamic (CFD) methods. Prior to a redesign, a validation study is conducted for the overall performance and flow details based on full-scale test data, proving that the multi-stage CFD applied is a relatively reliable tool for the analysis of the foll...

~ blade-element theory for aanid--ow compre8sor8has been deoeloped and applied to the anulysi8 of the. effects of basic deeign variabkwvuch as Mach number, blude loading, and mJocily didn”buiion on compree80r performance. A graphi.cul method tlwt ia u8efulfor approximate design cakulati0n8 i8 pre8ented. Tle relati0n8 among 8e8eralefinci48 useful in compressor design are derived and &cu8sed. The...