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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국유체기계학회 International Journal of Fluid Machinery and Systems International Journal of Fluid Machinery and Systems Vol.10 No.2
- 발행연도
- 2017.6
- 수록면
- 119 - 137 (19page)
- DOI
- 10.5293/IJFMS.2017.10.2.119
이용수
초록· 키워드
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Although the stall stagnation phenomena have often been experienced in site and also analytically in numerical experiments in surges in systems of compressors and flow paths, the fundamental causes have not been identified yet. In order to clarify the situations, behaviours of infinitesimal disturbance waves superposed on a main flow were studied in a simplified one-dimensional flow model. A ratio of the amplifying rate of the system instability to the characteristic slope of the compressor element was surveyed as the instability enhancement factor. Numerical calculations have shown the following tendency of the factor. In the situation where both the sectional area ratio and the length ratio of the delivery flow-path to the suction duct are sufficiently large, the enhancement factors are greater in magnitude, which means occurrence of ordinary deep surges. However, in the situation where the area ratio and/or the length ratio is relatively smaller, the enhancement factor tends to lessen significantly, which situation tends to suppress deep surges for the same value of the characteristic slope. It could result in the stall stagnation condition. In the domain of area ratio vs. length ratio of the delivery duct to the suction duct, contour-lines of the enhancement factor behave qualitatively similar to those of the stall stagnation boundaries of a fan analytically obtained, suggesting that a certain range of the enhancement factor values could specify the stagnation occurrence. The significant decreases in the factors are observed to accompany appearances of phase lags and travelling waves in the wave motions, which macroscopically suggests breaking down of the complete surge actions of filling and emptying of the air in the delivery duct. The strength of the action is deeply related with acoustic interferences and is evaluated in terms of the volume-modified reduced resonance frequency proposed by the author. These observations have shown the fundamental cause and the sequence of the stall stagnation in principle.
목차
Abstract
1. Introduction
2. Simplified Flow-path System and Parameters
3. Effect of a Compressor Element
4. Calculation Method of the System Behaviors
5. Effects of the Geometrical Parameters of the System on Sigma-factors
6. Comparison of Sigma-factor Behaviours with Stagnation Boundary of a Single-Stage Fan
7. Wave Motions in the Flow-paths
8. Considerations
9. Conclusion
References
참고문헌 (12)
참고문헌 신청
[학술지(정기간행물)] - Greitzer, E. M. / 1976 / Surge and Rotating Stall in Axial Flow Compressors, Part I: Theoretical Compression System Model / ASME, Journal of Engineering for Power 98 : 190 ~ 198
[학술지(정기간행물)] - Greitzer, E. M. / 1976 / Surge and Rotating Stall in Axial Flow Compressors, Part II: Experimental Results and Comparison with Theory / ASME, Journal of Engineering for Power 98 : 199 ~ 217
[학술지(정기간행물)] - Greitzer, E. M. / 1980 / REVIEW-Axial Compressor Stall Phenomena / Trans ASME, Journal of Fluids Engineering 102 : 134 ~ 151
[학술지(정기간행물)] - Greitzer, E. M. / 1981 / The Stability of Pumping Systems-REVIEW-The 1980 Freeman Scholar Lecture / Trans ASME, Journal of Fluids Engineering 102 : 193 ~ 242
[보고서] - Moor, F.K. / 1985 / Stall Transient of Axial Compression Systems with Inlet Distortion
[학술지(정기간행물)] - Greitzer, E. M. / 1976 / Surge and Rotating Stall in Axial Flow Compressors, Part II: Experimental Results and Comparison with Theory / ASME, Journal of Engineering for Power 98 : 199 ~ 217
[학술지(정기간행물)] - Greitzer, E. M. / 1980 / REVIEW-Axial Compressor Stall Phenomena / Trans ASME, Journal of Fluids Engineering 102 : 134 ~ 151
[학술지(정기간행물)] - Greitzer, E. M. / 1981 / The Stability of Pumping Systems-REVIEW-The 1980 Freeman Scholar Lecture / Trans ASME, Journal of Fluids Engineering 102 : 193 ~ 242
[보고서] - Moor, F.K. / 1985 / Stall Transient of Axial Compression Systems with Inlet Distortion
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UCI(KEPA) : I410-ECN-0101-2018-554-001894593