Flat Plate Pressure Distribution and Heat Transfer in a Conical Hypersonic Flow
Author: F. R. Bailey
Publisher:
Published: 1969
Total Pages: 27
ISBN-13:
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Author: F. R. Bailey
Publisher:
Published: 1969
Total Pages: 27
ISBN-13:
DOWNLOAD EBOOKAuthor: Davis H. Crawford
Publisher:
Published: 1968
Total Pages: 68
ISBN-13:
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Publisher:
Published: 2010
Total Pages: 32
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DOWNLOAD EBOOKThe effects of both steady and pulsating thermal bump presence in the vicinity of the boundary layer of generic bodies have been investigated. The variation of surface static pressure along a sharp leading edge flat plate at angle of attack (10 deg.) has been measured in the presence of both steady and pulsating thermal bump. In these studies, both argon and air have been used as test gases. A heating element capable of reaching 1280 K in an area of 13 sq mm is used to generate a steady thermal bump within the boundary layer of the flat plate model. A dielectric barrier discharge (DBD) over an area of 10 sq mm is used for generating pulsating thermal bump (~ 10 W/sq cm at 6, 8 and 19 kHz) near the leading edge of the flat plate. The static pressure distribution along the flat plate is measured at different pulsing frequency of DBD at hypersonic Mach numbers. The pressure field in the presence of steady thermal bump appears to be oscillatory. At some locations downstream of the bump the static pressure decreased by ~25 -30% while it increased by 10-15% at other locations in the vicinity of the hot spot. However substantial reductions in the downstream pressure (30 -50%) have been measured on the flat plate in the presence of oscillating thermal bump. The reduction appears to be strongly dependent on the pulsing frequency. The pressure reduction seems to be better with argon as test gas compared to the experiments with dry air. Due to the effects of electromagnetic interference and inherently lower values surface convective heat transfer rates on the flat plate in the presence of oscillatory thermal bump could not be measured. However, surface heat transfer rates on a cone-cylinder model in the presence of a steady thermal bump (40 W/sq cm) near the apex of the sharp cone has been measured.
Author: Victor Zakkay
Publisher:
Published: 1958
Total Pages: 66
ISBN-13:
DOWNLOAD EBOOKAuthor: J. P. RHUDY
Publisher:
Published: 1960
Total Pages: 48
ISBN-13:
DOWNLOAD EBOOKHeat transfer rates and pressure distributions on three basic shapes were investigated at a nominal Mach number of 8 and free-stream Reynolds numbers from 0.43 to 3.4 million per foot. The models were a 0.4-in. nose radius, spherically blunted, 15-deg half-angle cone; two flat plate models with 0. 10-in. and 0. 50-in. cylindrical blunting; and a modified leading-edge plate with auxiliary planes to produce changing body shape within the elliptic flow region. The tests produced data showing the effect on heat transfer rates of the interaction of the essentially inviscid, rotational flow behind the bow shock with the viscous boundary layer on the body. The results of pressure distribution tests show good agreement with theory. Heat transfer rates over the entire body were accurately predicted through the use of outer-edge boundary-layer conditions obtained from isentropic expansion from normal-shock stagnation conditions.
Author: Clifford Gee
Publisher:
Published: 1962
Total Pages: 116
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DOWNLOAD EBOOKAuthor: R. M. Grabow
Publisher:
Published: 1967
Total Pages: 94
ISBN-13:
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Publisher:
Published: 1973
Total Pages: 1040
ISBN-13:
DOWNLOAD EBOOKLists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: Michael E. Tauber
Publisher:
Published: 1989
Total Pages: 44
ISBN-13:
DOWNLOAD EBOOKAuthor: John J. Bertin
Publisher: AIAA
Published: 1994
Total Pages: 644
ISBN-13: 9781563470363
DOWNLOAD EBOOKA modern treatment of hypersonic aerothermodynamics for students, engineers, scientists, and program managers involved in the study and application of hypersonic flight. It assumes an understanding of the basic principles of fluid mechanics, thermodynamics, compressible flow, and heat transfer. Ten chapters address: general characterization of hypersonic flows; basic equations of motion; defining the aerothermodynamic environment; experimental measurements of hypersonic flows; stagnation-region flowfield; the pressure distribution; the boundary layer and convective heat transfer; aerodynamic forces and moments; viscous interactions; and aerothermodynamics and design considerations. Includes sample exercises and homework problems. Annotation copyright by Book News, Inc., Portland, OR