Abstract：The power transmission characteristics of hydrodynamic torque converter are highly influen-ced by internal flow structure. The external performance of hydrodynamic torque converter is determined by internal flow characteristics. It has important meanings to grasp the complex internal flow in hydrodynamic torque converter based on visualization of internal flow field and quantitative measurement of internal flow velocity. Research on internal flow mechanism of hydrodynamic torque converter can be improved through detailed and accurate experimental results. The internal flow field of the pump was measured based on particle image velocimetry(PIV)technology, and flow images on radial section of the pump were captured by CCD camera with single exposure, when motion information of tracer particles were recorded. Image features of tracer particle trajectory were identified by image processing techniques, and trajectories of tracer particles were extracted automatically based on Hough transform for line detection theory. By using the method above, flow visualization of the pump was achieved, and the efficiency of identification and quantification for flow velocity vector was improved. The results of PIV measurement can reveal the real physical flow phenomena and transient changes of internal flow field in the pump, and the theory and practice basis for performance prediction and ratio-nal design of hydrodynamic torque converter can be provided.
柴博森, 刘春宝, 王卫东. 基于霍夫变换的液力变矩器泵轮内部流速提取[J]. 排灌机械工程学报, 2014, 32(4): 283-289.
Chai Bosen, Liu Chunbao, Wang Weidong. Extraction of internal flow velocity in pump of hydrodynamic torque converter based on Hough transform. Journal of Drainage and Irrigation Machinery Engin, 2014, 32(4): 283-289.
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