亚跨超风洞现代试验设计方法研究

Applications of modern design of experiments to wind tunnel tests

开展了基于现代试验设计方法(MDOE)的亚跨超风洞试验研究,以八号标模尾翼为试验对象研究其气动特性,采用同时改变攻角-侧滑角的多变量方法,而不是传统的单变量(OFAT)方法进行试验。对自变量攻角和侧滑角进行试验设计(DOE),应用响应面法建模,用IV-最优方法对测量点分布进行设计。在FD-12亚跨超风洞完成了试验,并和传统的OFAT方法结果进行比较分析。结果表明:MDOE方法获得的数据和传统的OFAT方法的数据吻合很好;MDOE采集样点数减少了46%,吹风的时间比OFAT减少30%左右,提高了风洞试验效率,缩短了试验周期;MDOE试验方法可以给出设计空间内任意给定自变量对应的响应值及其置信区间。

Wind tunnel tests based on modern design of experiments (MODE)were carried out to measure the fin aerodynamic characteristics of No.8 standard model.A dual variable (an-gle of attack and sideslip angle)method was used instead of OFAT (One Factor at A Time) method,which was commonly applied in traditional wind tunnel tests.Fist,design of experi-ment was done on angles of attack and sideslip angles simultaniowly,and the models were built by the response surface methodology (RSM),and the distribution of measured points was deter-mined by IV-optimal methodology.The MODE tests were completed in FD-12 transonic wind tunnel after the improving of the control system of the wind tunnel,while the traditional OFAT tests were also done for the comparison.Results show that the test data from both MDOE and OFAT are well meet,46% measured points were reduced in MODE tests,and the test time con-sumed by MODE tests is 30% less than that by OFAT tests,which improve the efficient of the wind tunnel test.The MODE tests are capable of reducing the systematical errors through repeti-tions,blockings and randomizations,while the uncertainty estimation of all the results on the de-sign volume can achieved in details.