1、REPORT No. 546 .THE EFFECT OF TURBULENCE ON THE DRAGBy G. B. SCHUBAUEItand H. L. DRYDENOF FLAT PLATESSUMMARYIn determining the e$ect of turbulence on the formewv?edon boditx in the air 8treamof a wind tunnel, d hcornmordyamwmedthd the indicuiicwwof the standurdpitot-8taJictube waedto determine th4 a
2、ir speed are notokpendeni on tb turbulence. To invenevertheless it is enough to be of importance in precisework.F,04%+-cl N ftper se. o.L020 00 00$!1.00-Qc-.2i! or, if we wishto imagine a separated boundary layer enveloping thewake, perhaps the exterior turbulence tiects thestability of this layer.
3、Whatever the explanation,the work with the pressure disk indicates that turbu-lence does lower the pressure in the wake.NATIONAL BunEAu OF STANDARDS,WASHINGTON, D. C., June %2, 1936.REFERENCES1. Dryden, Hugh L.: TUI bulen Companion of ReynoldsNumber. Jour. Aero. hi., vol. I, no. 2, April 1934, p. 67
4、2. Ovrer, E., and Johansen, F. C.: On a Determination of thePitit-Static Tube Factor at LOW Reynoldc Numbers, withSpeoial Reference to the Mwmrement of Imv Air Speeda.IL & M. No. 1437, British A. IL C., 1931.3. Schubauer, G. B.: A Turbulence Indicator Utilizing theDiffueion of Heat. T. R. No. 524, N. A. C. A., 1935.4. Mock, W. C., Jr., and Dryden, H. L.: Improved Ap-paratus for the Murement of Fluotuationa of Air Speed inTurbulent FIOTV. T. IL No. 448, N. A. C. A., 1932.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
