Aerodynamic Analysis of Automotive HVAC Duct for Enhancement of Cooling/Heating Performance

ABSTRACT:In the present work, numerical analyses of air flow in HVAC duct have been carried out for enhancement of cooling/heating performance. For the analyses, three-dimensional Reynolds-averaged Navier-Stokes equations have been solved with the shear stress transport turbulence model. The numerical results were validated in comparison with the experimental data. Based on the numerical results, the HVAC duct was designed to reduce the pressure loss. The modified duct geometry shows largely reduced pressure drop in comparison with the reference geometry. And, through modified duct shape, the performance of air conditioning has been enhan-ced.Keywords:HVAC duct(공기조화 덕트), RANS analysis(RANS 해석), Vortex(와류), CFD(전산유체역학), Pressure drop(압력손실) †Corresponding author Tel.: +82-32-860-7317; fax: +82-32-868-1716 E-mail address: jjw529@naver.com 기 호 설 명 A ：덕트 단면D ：덕트 입구 수력직경 [m]LC ：좌측 중간 덕트LH ：좌측 덕트RC ：우측 중간 덕트RH ：우측 덕트LH ：좌측 덕트X, Y, Z：좌표 축 1. 서 론 최근 자동차산업에서 차량의 상품성은 주행성능과 더불어 인간의 감성을 위한 쾌적성에 의해서도 평가되고 있는 상황이다. 따라서 최근 생산되는 자동차들에서는 자동차 실내 공기조화를 위한 HVAC (Heating Ventilating Air Conditioning) 시스템의