국내 최대 기계 및 로봇 연구정보

공학설계D/B

공학설계D/B 게시판 내용
Volume Title	Aerodynamics
Volume No	EXCRESCENCE DRAG - Excrescence drag
DATA Title	Drag due to grooves in a flat plate with a turbulent boundary layer, at subsonic and supersonic speeds.
DATA Item	75028
KEYWORD	boundary, drag, excrescence, flow, groove, layer, supersonic, turbulent
ISBN	0 85679 132 6
ABSTRACT	ESDU 75028 gives curves, derived from a correlation of experimental data, that enable the drag increment to be predicted due to a groove of planform aspect ratio greater than 8 normal to the flow. For grooves inclined at angles to the flow exceeding 60 degrees the data for the grooves normal to the flow apply, while for grooves inclined between 0 degrees (parallel to the flow) and 60 degrees a method for obtaining the maximum increment is suggested based on the use of ESDU 75031 to predict the increments due to the forward- and rearward- facing steps together with an appropriate skin friction allowance.