Application and performance estimation of Mg/CO2 engine on Mars

2021 ◽  
Author(s):  
Mengzhe Li ◽  
Chunbo Hu ◽  
Zhiqin Wang ◽  
Yue Li ◽  
Jiaming Hu ◽  
...  
Keyword(s):  
Performance Estimation ◽  
And Performance

scholarly journals Characterization and Performance Estimation of a MEMS Spirometer

2016 ◽  
Vol 168 ◽  
pp. 1020-1023 ◽  
Author(s):  
Sahar Habibiabad ◽  
Yeşim Serinağaoğlu Doğrusöz ◽  
Mustafa İlker Beyaz
Keyword(s):  
Performance Estimation ◽  
And Performance

Performance prediction of axial flow compressors using stage characteristics and simultaneous calculation of interstage parameters

2001 ◽  
Vol 215 (1) ◽  
pp. 89-98 ◽  
Author(s):  
T. W. Song ◽  
T. S. Kim ◽  
J. H. Kim ◽  
S. T. Ro
Keyword(s):  
Gas Turbine ◽  
System Analysis ◽  
Axial Flow ◽  
Performance Estimation ◽  
Predicting Performance ◽  
Functional Formulation ◽  
Compressor Inlet ◽  
Multistage Compressors ◽  
And Performance ◽  
Axial Flow Compressors

A new method for predicting performance of multistage axial flow compressors is proposed that utilizes stage performance curves. The method differs from the conventional sequential stage-stacking method in that it employs simultaneous calculation of all interstage variables (temperature, pressure and flow velocity). A consistent functional formulation of governing equations enables this simultaneous calculation. The method is found to be effective, i.e. fast and stable, in obtaining solutions for compressor inlet and outlet boundary conditions encountered in gas turbine analyses. Another advantage of the method is that the effect of changing the angles of movable stator vanes on the compressor's operating behaviour can be simulated easily. Accordingly, the proposed method is very suitable for complicated gas turbine system analysis. This paper presents the methodology and performance estimation results for various multistage compressors employing both fixed and variable vane setting angles. The effect of interstage air bleeding on compressor performance is also demonstrated.

Drive modelling and performance estimation of IPM motor using SVPWM and Six-step Control Strategy

2021 ◽  
Keyword(s):  
Comprehensive Evaluation ◽  
Element Model ◽  
Torque Ripple ◽  
Performance Estimation ◽  
Smooth Transition ◽  
Motor Speed ◽  
Traction Motor ◽  
Modulation Techniques ◽  
And Performance ◽  
The Impact

This paper presents a comprehensive evaluation of the performance of an interior permanent magnet (IPM) traction motor drive, and analyses the impact of different modulation techniques. The most widely used modulation methods in traction motor drives are Space vector modulation (SVPWM), over-modulation, and six-step modulation have been implemented. A two-dimensional electromagnetic finite element model of the motor is co-simulated with a dynamic model of a field-oriented control (FOC) circuit. For accurate tuning of the current controllers, extended complex vector synchronous frame current regulators are employed. The DC-link voltage utilization, harmonics in the output waveforms, torque ripple, iron losses, and AC copper losses are calculated and compared with sinusoidal excitation. Overall, it is concluded that the selection of modulation technique is related to the operating condition and motor speed, and a smooth transition between different modulation techniques is essential to achieve a better performance.

Design and Performance Estimation of a 20 T 46 mm No-Insulation All-REBCO User Magnet

2020 ◽  
Vol 30 (4) ◽  
pp. 1-5
Author(s):  
Kwangmin Kim ◽  
Kabindra Bhattarai ◽  
Kwang Lok Kim ◽  
Hongyu Bai ◽  
Iain R. Dixon ◽  
...  
Keyword(s):  
Performance Estimation ◽  
And Performance
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