LOCAL ENDWALL HEAT/MASS TRANSFER AND PRESSURE DROP IN A PIN FIN CHANNEL WITH LATERAL FLOW EJECTION. Conference Paper uri icon

abstract

  • Naphthalene sublimation and pressure measurement experiments have been conducted to study the effect of lateral flow ejection on the local endwall heat transfer and the pressure drop for turbulent flow through a pin fin channel. The detailed distributions of the local endwall heat/mass transfer coefficient were determined for ejection ratios of 0, 0. 5, and 1. 0, and for the flow Reynolds number of about 23,000. The pressure data were obtained for various flow exit geometries, ejection ratios between 0 and 1. 0, and Reynolds numbers between 6,000 and 30,000. The results illustrated the turning of the main flow stream away from the straight flow direction in the pin fin channel, when there was lateral flow ejection. The mass flow through the lateral ejection slots decreased with increasing distance from the channel entrance, resulting in high heat/mass transfer in the vicinity of the ejection slot near the channel entrance. The results also demonstrated the existence of a large recirculation zone in the pin fin channel.

author list (cited authors)

  • Kim, Y. S., Lau, S. C., & Han, J. C.

publication date

  • December 1987