Coherence Mapping of Unsteady Pressure Fields on 2-Dimensional Wings Using Unsteady Pressure-Sensitive Paint Technique
Coherence and its length of unsteady flow fields are an important information to investigate aeroacoustic flow fields.Unsteady Pressure-Sensitive Paint(PSP)measurement is an optical pressure measurement technique.It can acquire global unsteady pressure distribution including coherence map on a test model.It was applied to investigate coherence distribution on two 2-dimensional models,which were the NACA0012 and the NASA 30P30N models.For the NACA0012 test,unsteady PSP measurement was applied to the unsteady flow field of the trailing-edge noise on the model.Unsteady power spectrum density of Cp and coherence maps were reduced in three angle of attack cases,which were ?α=-1.5°,-2.5°,and-4° in U=28m/s flow.For the NASA 30P30N model test,unsteady PSP measurement was applied to its slat cove to investigate the coherence distribution of the aeroacoustic flow field in U=58m/s flow.It had spectral components of the specific narrow-band peaks(NBPs)and broadband.Unsteady PSP measurement was conducted in an angle of attack case of α=0°.The coherence distribution measured by the unsteady PSP measurement were also compared with that of Kulite unsteady pressure transducers.
Aerodynamics Unsteady Pressure-Sensitive Paint (PSP)
Kazuyuki Nakakita
Japan Aerospace Exploration Agency(JAXA),7-44-1,Jindaiji-Higashi,Chofu,Tokyo 182-8522,Japan
国际会议
2014 Asia-Pacific International Symposium on Aerospace Technology(2014亚太航空航天技术学术会议)
上海
英文
1-11
2014-09-24（万方平台首次上网日期，不代表论文的发表时间）