In this work the effect of the tube geometry on the performance of a staggered tube cross-flow heat exchanger, similar to the inlet air pre-coolers in hypersonic aircrafts and air-breathing launch vehicles, is studied using computational fluid dynamics (CFD) at sea level conditions with air velocity of up to 50 m/s. Single tube simulations showed a decrease in drag coefficient and increased utilization of tube surface area for heat exchange when elliptical or obround tubes are used instead of a circular tube. In a tube bank, the heat transfer coefficient is enhanced and the friction factor is reduced by using the elliptical and obround tubes as compared to circular tubes. Overall, for the same heat duty, elliptical and obround tube pre-coolers are lighter and compact but the pressure drop is higher than a circular tube pre-cooler.
|出版ステータス||出版済み - 1 1 2015|
|イベント||7th Asia-Pacific International Symposium on Aerospace Technology, APISAT 2015 - Cairns, オーストラリア|
継続期間: 11 25 2015 → 11 27 2015
|会議||7th Asia-Pacific International Symposium on Aerospace Technology, APISAT 2015|
|Period||11/25/15 → 11/27/15|
All Science Journal Classification (ASJC) codes