Rotating Probe Measurement of The Pump Passage Flow Field in An Automotive Torque Converter  

Oleh:

Dong, Y. ; Lakshminarayana, B.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Fluids Engineering vol. 123 no. 1 (2001), page 81-91.
Topik: rotating; rotating; probe measurement; pump passage flow; field; automotive; torque; converter

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ89.2 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

Lihat Detail Induk

Isi artikel

The relative flow in an automotive torque converter pump passage was measured at three locations inside the passage (mid - chord, 3/4 - chord, and 4/4 -chord) using a miniature high - frequency response five - hole probe in the pump rotating frame. A custom - designed brush - type slip - ring unit is used in the rotating probe system to transmit the amplified signal from the probe in the rotating frame to the stationary frame. At speed ratio of 0.6, a weak "jet - wake" flow pattern is observed at the pump mid - chord. High flow loss is observed in the core - suction corner due to the "wake" flow caused by the flow separation. A strong clockwise secondary flow is found to dominate the flow structure at the pump mid - chord. The Coriolis force and the through flow velocity deficit near the core at the pump inlet are the main reasons for this secondary flow. The jet-wake flow pattern at the 3/4 - chord is enhanced by the upstream secondary flow. A jet -wake flow pattern is also observed at the pump 4/4 - chord, with concentration of the flow near the passage pressure side. The secondary flow changes its direction of rotation from the 3/4 - chord to 4/4 - chord. This is mostly caused by the passage meridional curvature and the flow concentration. High loss is found in the core - suction corner wake flow due to a low kinetic energy flow accumulation and the flow separation. Finally, the pump flow field is assessed through the mass - averaged total pressure and relative pressure loss parameter. The data are also analyzed to assess the effect of the speed ratio on the flow field.

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