C.P. No. 985 MINISTRY OF TECHNOLOGY AERONAUTICAL RESEARCH COUNCIL Measurements of Pressure Fluctuations and Skin Friction on the Upper Surface of a Slender

نویسندگان

  • D. Walker
  • J. Turner
چکیده

SuNihiiAIly FOUr slW~%%-~ing free-fligh t models were used to invcstigato the local pressure fluctuatmns, skin-fricticn and static-prcssurcs across OM spanwise station unaer ver37ing coalitions of lift ma ?,isch number. At Nach numbers bctneen 0.8 ana l-2 a dell-estzblishcd free-vortex flow ~ss a~hiaved over the uppzr surface. T%e intention nas to deternine the ratlo between the intcnsiti~ 3f tho pressdw fYdcD2,tions and the 10231 sldn-friction under conditions of atthea and scpsraied flows. While ncasurenonts of masonable quality were obtained, the inherent limitations of the tclmetry sys2-e~ did not allow a sufficiently broad. band of pressure-fluctuaclon frequenmes to be masured so that the relationship i;ith skin-friction could not be determine& Therefore, 3. detailed analysis of the results ana comparlaon with other expetimental OS theoretical aats has not been attenpted. But the present results are consIdered to be a useful and signlf~cant addition to the rather nertgre experinental data that exists on this subject, partmdsrly because they were obtamea in con&itions free from flow imperfactzons suck as free-stream turbulence which exist in most wind-tunnels.

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تاریخ انتشار 1966