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Buchlin, J.M. (author), Ginoux, J.J. (author)
A test facility developed at the von Karman Institute to simulate hot spots in gas cooled thermal reactors using fuel packed beds is described. A series of typical results is discussed which confirm the good tuning of the test set-up and proves the exitence of hot spots.
report 1975
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Ginoux, J.J. (author), Matthews, R.D. (author)
The static pressure and heat transfer rate distributions have been measured in the reattachment region of free shear layers. In the first part, a cone/cavity model and the effects of gas injection have been studied. Results have been presented for both laminar and turbulent flows. In the second part, a flow model has been investigated which is...
report 1973
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Gautier, B.G. (author), Ginoux, J.J. (author)
This report describes a theoretical and experimental investigation of the effect of wall cooling • on the overall features of shock wave laminar boundary layer interactions in hypersonic two dimensional flow. The integral metho4 of Lees-Reeves-Klineberg has been modified in order to compute viscous interactions over a continuous range of wall-to...
report 1973
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Barker, R.H. (author), Riethmuller, M.L. (author), Ginoux, J.J. (author)
A laser-doppler "fringe" velocity meter was developed with the use of simple optical equipment and low laser power (less than 1 milliwatt), for the measurement of the velocity of solid particles (diameter up to 500 microns) in a two-phase flow. The potential for a higher signal-to-noise ratio and the ease of alignment made the fringe technique...
report 1972
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Ginoux, J.J. (author), Joly, C. (author)
The purpose of this study is to find the influence of a local Obstruction on heat transfer between one particle in a-p packed bed and the coolant gas which is forced through it. A method is chosen and developed, giving average as well as local heat transfer coefficients in the case of a packed bed containing spherical particles of constant...
report 1972
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LeBlanc, R. (author), Horton, H.P. (author), Ginoux, J.J. (author)
report 1971
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Stock, H.W. (author), Ginoux, J.J. (author)
Cross-hatching has been studied experimentally at a free stream Mach number of 5.3, using two different low temperature ablative materials, Camphor and wax, which respectively sublime and liquefy. The surface pattern parameters (i.e. the cant angle ~ and the streamwise spacing A) have been correlated with flow field properties, initial surface...
report 1971
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Ginoux, J.J. (author), Thiry, F. (author)
A previous experimental study of the favorable effect of mass injection into a hypersonic separated laminar flow on pressure .and heat transfer distributions at reattachment has been extended to include the influence of a small incidence of the model. Measurements were made at M = 5.3 on a circular cone with an annular cavity. into which air was...
report 1971
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Gautier, B.G. (author), Ginoux, J.J. (author)
The integral method of Lees and Reeves-Klineberg has been used to study the effect of changes of wall temperature ratio upon wall pressure and heat transfer distributions, of a shock wave - laminar boundary layer interaction generated by a two-dimensional deflected surface. Klineberg extended the integral method of Lees and Reeves to the non...
report 1971
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Leblanc, R. (author), Ginoux, J.J. (author)
report 1970
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Ginoux, J.J. (author)
This paper is a review of some of the work done at the von Karman Institute over the past years on separated flows. Emphasis is given on a fundamental phenomenon developing in reattaching high speed flows. namely, spatially periodic patterns of counter-rotating streamwise vortices. Detailed surveys made with pitot-static tubes, hot wire probes,...
report 1969
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Schnell, W.C. (author), Ginoux, J.J. (author)
report 1968
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Ginoux, J.J. (author)
Static pres sure, recovery temperature and heat transfer distributions have been measured on flat plates with flaps at a Mach number of 2.02. A uniform amount of heat was dissipated at the surface of the models. The angle of the flaps was varied between I.5 ° and 21 °. Laminar, transitional, and turbulent flows were considered. Well defined...
report 1966
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Ginoux, J.J. (author)
An experimental investigation has been made in various supersonic and hypersonic wind tunnels at VKI to determine the effect of Mach number on the existence of streamwise vortices in the reattachment region of the flow over two-dimensional backward facing steps o It was found that the phenomenon previously observed at M = 2,21 remained unchanged...
report 1965
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Ginoux, J.J. (author)
report 1963
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Ginoux, J.J. (author)
An experimental investigation was made on laminar separated supersonic streams using two-dimensional backward-facing step models. It was shown that a cross-flow existed in the separated region of the flow which is associated with the side wall boundary-layers. lts effect is to decrease the base pressure and increase the pressure gradient at...
report 1962
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Ginoux, J.J. (author)
An experimental investigation has been made at a Mach number of 2021 on the effect of air injection in separated supersonic flows using two-dimensional backward facing step models. This effect, in a laminar flow, was found to be independent of the particular technique of injection when the rate of injection was small. Air injection raises the...
report 1962
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Ginoux, J.J. (author)
Following earlier tests (Ref. 1), in the T.C.E .A. supersonic tunnel S-l (Ref. 2), on a two-dimensional backward-facing step model in which span-wise perturbations were found in the reattachment region, further studies have been made using the same and other similar models. In these later studies, the same three - dimensional perturbations were...
report 1961
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Ginoux, J. (author)
report 1960
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Ginoux, J.J. (author)
Presented to the Wind Tunnel and Model Testing Panel of the Advisory Group for Aeronautical Research and Development Boundary-Layer Research Meeting London , April 25-29, 1960. The reattachment region of a laminar boundary-layer af ter separation has been investigated in TCEA facilities at a Mach number of 2.16. Two-dimensional compression...
report 1960
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