Ryuutai Kougaku Bumon Kouenkai kouen rombunshuu/Ryutai Kogaku Bumon Koenkai koen ronbunshu • Vol 2020 • No 0
Influence of Spatial Arrangement of Vortex Generators in a Boundary Layer Flow upon Heat Transfer Enhancement Effect
January 2020 • Takumi Ohta, Akihiko Mitsuishi, Takaaki Shimura, Kaoru Iwamoto, Akira Murata
Aiming at applying vortex generators (VGs) to a piston surface of a spark ignition engine for cooling the air-fuel mixture, direct numerical simulation of a laminar boundary layer flow was performed to investigate heat transfer enhancement effect by two VGs. Triangular pyramid shaped VGs are installed on the lower wall. The height of VG is the same as inlet boundary layer thickness (δ0) and arranged at 10.0δ0 interval in the longitudinal direction. Laminar boundary layer flow is given as the inlet boundary conditi…