• Title/Summary/Keyword: 동익

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Performance Characteristics of Velocity Compound Supersonic Impulse Turbine with the Rotor Overlaps (속도 복합형 초음속 충동형 터빈의 동익 오버랩에 따른 성능특성)

  • Cho, Jong-Jae;Kim, Kui-Soon;Jeong, Eun-Hwan
    • Journal of the Korean Society of Propulsion Engineers
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    • v.15 no.1
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    • pp.19-28
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    • 2011
  • As a preview study, present research analysed the performance characteristics of a velocity compound supersonic impulse turbine with the rotor overlaps before adapting the overlap has the best turbine performance. This research was conducted for the turbine with square cross-section nozzles instead of axisymmetric nozzles and wrap around nozzles. Through 3-dimensional flow analysis for the turbine by a commercial flow analysis package, tip overlap case was more effective to improve the turbine performance than case hub overlap, and overlap case applied the hub and tip of the rotor had the largest improvement for the turbine performance in the cases. In case of overlap for the 2nd stage rotor, improvement of the turbine performance was not visibly large. Because, generated power in the 2nd stage is 22~23% of whole generated turbine power.

Numerical Analysis for Flow in Two-Stage Supersonic Turbines (2단형 초음속 터빈의 유동에 대한 전산해석)

  • Cho, Jong-Jae;Seo, Jong-Chul;Kim, Sang-Jo;Kim, Kui-Soon;Jeong, Eun-Hwan
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2010.05a
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    • pp.362-366
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    • 2010
  • Numerical Analysis of two-stage supersonic turbines were conducted, and the results were analyzed. $FLUENT^{TM}$ commercial flow analysis package was employed for the calculation of the turbine. Characteristics of the turbine performance were investigated according to the overlap height and existence of the shroud at the second rotor blade through the calculations.

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