CAJ | 학술논문

以计算流体力学理论为基础,结合节能竞技赛车车身设计要求,确定车身总体方案。利用FLUENT对CATIA软件绘制出的不同车身造型进行数值模拟,优选风阻系数小,升力系数小的符合空气动力学特性的车身造型方案为基础车身造型方案。针对基础车身造型模拟其周围流场,模拟结果显示离地间隙越小则风阻系数越小,前轴到车身最前端的距离和车身宽度越大则风阻系数越大。观察相应的外流场与车身表面流态速度和受力的分布情况,根据模拟数据指导车身造型进行局部修改,最终提出节能竞技赛车车身造型方案。
이계산류체역학이론위기출,결합절능경기새차차신설계요구,학정차신총체방안。이용FLUENT대CATIA연건회제출적불동차신조형진행수치모의,우선풍조계수소,승력계수소적부합공기동역학특성적차신조형방안위기출차신조형방안。침대기출차신조형모의기주위류장,모의결과현시리지간극월소칙풍조계수월소,전축도차신최전단적거리화차신관도월대칙풍조계수월대。관찰상응적외류장여차신표면류태속도화수력적분포정황,근거모의수거지도차신조형진행국부수개,최종제출절능경기새차차신조형방안。
In this paper,the design of sports car body scheme was determined based on the CFD theory in combination of the body design requirements of energy saving sports cars.CATIA software was used to map different body modeling and FLUENT was used to perform numerical simulations.Then,the base car body design scheme was selected in terms of smaller wind resistance coefficient and lift coefficient as well as aerodynamical characteristics.According to the basic body modeling simulation of the flow field around the ground clearance,the results showed that the smaller the ground clearance the smaller the wind resistance coefficient,the greater the distance from the front axle to the front end of the car body and the width of the body the greater the wind resistance coefficient.According to the observation of the external flow field and the corresponding body surface flow velocity and stress distribution as well as the simulation data,partial modification was made on the body styling,and the body styling scheme of energy saving sports cars was finally put forward.