Topic
Axial compressor
About: Axial compressor is a(n) research topic. Over the lifetime, 12035 publication(s) have been published within this topic receiving 127766 citation(s).
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01 Jan 1973
TL;DR: In this article, the authors present an analysis of the performance of simple gas turbines for aircraft propulsion and demonstrate that simple gas turbine cycles can be used to achieve state-of-the-art performance.
Abstract: 1. Introduction 2. Shaft power cycles 3. Gas turbine cycles for aircraft propulsion 4. Centrifugal compressors 5. Axial flow compressors 6. Combustion systems 7 Axial and radial flow turbines 8. Prediction of performance of simple gas turbines 9. Prediction of performance - further topics Appendix A Some notes on gas dynamics Appendix B Problems Appendix C References Index
1,168 citations
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1,091 citations
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TL;DR: In this paper, an approximate theory for post-stall transients in multistage axial compression systems is presented, which leads to a set of three simultaneous nonlinear third-order partial differential equations for pressure rise, and average and disturbed values of flow coefficient, as functions of time and angle around the compressor.
Abstract: An approximate theory is presented for post-stall transients in multistage axial compression systems. The theory leads to a set of three simultaneous nonlinear third-order partial differential equations for pressure rise, and average and disturbed values of flow coefficient, as functions of time and angle around the compressor. By a Galerkin procedure, angular dependence is averaged, and the equations become first order in time. These final equations are capable of describing the growth and possible decay of a rotating-stall cell during a compressor mass-flow transient. It is shown how rotating-stall-like and surgelike motions are coupled through these equations, and also how the instantaneous compressor pumping characteristic changes during the transient stall process.
768 citations
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TL;DR: In this article, the vortical flow patterns in the wake of a NACA 0012 airfoil pitching at small amplitudes were studied in a low speed water channel, and it was shown that a great deal of control can be exercised on the structure of the wake by the control of the frequency, amplitude and also the shape of the oscillation waveform.
Abstract: The vortical flow patterns in the wake of a NACA 0012 airfoil pitching at small amplitudes are studied in a low speed water channel. it is shown that a great deal of control can be exercised on the structure of the wake by the control of the frequency, amplitude and also the shape of the oscillation waveform. An important observation in this study has been the existence of an axial flow along the cores of the wake vortices. Estimates of the magnitude of the axial flow suggest a linear dependence on the oscillation frequency and amplitude.
619 citations