%0 Journal Article
%T NUMERICAL SIMULATION OF THE EFFECTS OF VORTEX CONTROL BY USING BI-FLAP SYSTEM ON A DELTA WING<br>三角翼的双襟翼控涡作用的数值模拟研究
%A Yuan Li
%A Hsing Tingding
%A <br>袁礼
%A 忻鼎定
%J 力学学报
%D 2000
%I 
%X Numerical simulation of the incompressible flow past a 74 delta wing equipped with an apex flap and a leading-edge flap was conducted to investigate the effects of vortex control by using such a hi-flap system. The three-dimensional incompressible Navier-Stokes equations in curvilinear coordinates were solved by using pseudo-compressibility method. The implicit approximatelyfactorized scheme was utilized to solve the discrete equations resulting from the application of backward Euler difference for time derivative and second-order upwind TVD scheme for inviscid terms. Baldwin-Lomax turbulence model was used. Flowfields past three kinds of planform and the resulting aerodynamic characteristics were computed for 10 ~ 50 range of incidence. The comparison of numerical and previous experimental results shows that vortex breakdown can be delayed, and drag reduction, lift/drag ratio and other aerodynamic characteristics near stall can be improved by drooping the flap downward. The hi-flap system has its performance superior to NASA leading-edge flap system or a single delta wing.
%K hi-flap control
%K detached vortex
%K incompressible N-S equations
%K pseudo-compressibilty method
%K turbulence<br>双襟翼控涡作用
%K 三角翼
%K 高速飞行器
%K 数值模拟
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=4100DA4A1A3BA1B0CE5AD99AE1DFB420&aid=5DC7460978AC5959&yid=9806D0D4EAA9BED3&vid=9971A5E270697F23&iid=0B39A22176CE99FB&sid=70AC2EF7F2065E09&eid=4C100B7696CE9E24&journal_id=0459-1879&journal_name=力学学报&referenced_num=2&reference_num=8