LDV를 이용한 토크 컨버터 내 유동의 실험적 분석(Ⅱ)
Experimental Analyses of Flow in a Production Torque Converter Using LDV(Ⅱ)
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LDV(laser Doppler velocimetry) measurements were conducted at a total of four planes at 0.4 speed ratio. The speed ratio of 0.4 is 1600rpm of impeller and 633rpm of turbine speed. Even at the speed ratio 0.4, fluid flow at the gap region between the impeller and turbine and impeller exit was leaving the impeller and flowing up behind the turbine, and flows were affected by the turbine blade as it passed, negatively effecting converter efficiency. In the gap region, fluctuations make a clear sinusoidal trend unclear. The rise and fall of the flow rates in a broad sense, indicate a dependency based on the passage of the turbine blade in front of the impeller passage exit but a sinusoidal trend is not evident from this data.
Abstract
LDV(laser Doppler velocimetry) measurements were conducted at a total of four planes at 0.4 speed ratio. The speed ratio of 0.4 is 1600rpm of impeller and 633rpm of turbine speed. Even at the speed ratio 0.4, fluid flow at the gap region between the impeller and turbine and impeller exit was leaving the impeller and flowing up behind the turbine, and flows were affected by the turbine blade as it passed, negatively effecting converter efficiency. In the gap region, fluctuations make a clear sinusoidal trend unclear. The rise and fall of the flow rates in a broad sense, indicate a dependency based on the passage of the turbine blade in front of the impeller passage exit but a sinusoidal trend is not evident from this data.
참고문헌 (7)
- 유성출, "LDV를 이용한 토크컨버터 내 유동의 실험적 분석", 한국기계기술학회지, 20(6), pp.757~762 (2018), 한국기계기술학회[DOI]
- Flow Visualization and Measurements of Torque Converter Stator Blades Using a Laser Sheet Lighting Method and Laser Doppler Velocimetr, "H. Watanabe", SAE, ~, pp.SAE Paper No. 970680 (1997)
- B. Lakshminarayna, "Perspective: Fluid Dynamics and Performance of Automotive Torque Converter: An Assessment", Journal of Fluids Engineering, 118, pp.665~676 (1996)
- Quantification of Primary Flows of a Torque Converter Using Laser Doppler Velocimetry, "K. Lee", SAE, ~, pp.SAE Paper No. 2000-05-0106 (2000)
- 유성출, "실린더 내 유동해석에 레이저 기반 유동 진단기술 적용을 위한 실험용 Four-valve SI 기관의 설계 및 제작기술 개발", 한국기계기술학회지, 20(3), pp.377~382 (2018), 한국기계기술학회[DOI]
- 유성출, "토크 컨버터 내부 유동장의 실험적 연구", 한국가시화정보학회지, 8(4), pp.19~25 (2010), 한국가시화정보학회
- Performance Analysis of a Torque Converter with Three Dimensional Flow Simulation, "S. Shin", KSAE, ~, pp.KSAE Paper No. 98370120 (1998)