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Chan, Y.Y. (author)
A combined compressibility and similarity transformatian has been derived for the equatians of three-dimensional laminar boundary layers in compressible flow. The resulting equations closely resemble the corresponding equations for incompressible flow. Because of the coupling of the temperature field in the momentum equations. it is not possible...
report 1967
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Chan, Y.Y. (author)
report 1965
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Chan, Y.Y. (author), Mason, R.P. (author), Reddy, N.M. (author)
report 1965
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Chan, Y.Y. (author)
Based on the data of near field surveys of the sound pressure from a choked jet, a simple model is proposed for the mechanism of the screech generation. A convected wave propagates downstream along the jet boundary and is modulated by its interaction with the shock-expansion waves of the jet. These interactions generate strongdipoleradiations....
report 1972
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Chan, Y.Y. (author)
Three-dimensional laminar boundary layers with suction or injection are examined by using an approximate method based on a small cross-flow assumption. The basic equations are derived in detail and the computational method is developed. The method is tested against exact solutions and is found to be reasonably accurate. Two examples with the...
report 1969
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Chan, Y.Y. (author)
The parametric method of Loitsianskii in the theory of laminar boundary layers is extended to include suction or injection at the surface. The universal equation is generalized to include the suction parameters. A power series solution of the universal equation in terms of two parameters, namely, the external velocity gradient and the surface...
report 1968
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Chan, S.K. (author)
report 1973
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Chan, Y.Y. (author)
Experimental data obtained in the NAE Two-Dimensional Test Facility for CAST 10-2jDOA2 supercritical airfoil have been analyzed for the effects of Reynolds number, transition fixing and Mach number. The data were obtained for Reynolds numbers from 6 to 30 million and Mach numbers from 0.3 to 0.8 with fixed and free transitions. The analysis...
report 1988
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Chan, H.S.Y. (author)
The College of Aeronautics was founded in 1946 and was granted university status in 1969 becoming the Cranfield Institute of Technology. In 1993 it changed its name to Cranfield University.
report 1963
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Chan, Y.Y. (author)
The transonic equivalence rule with lift has been studied experimentally. Under the conditions defined by the rule, wing-body models with the same cross-sectional area distribution but with wings of different aspect ratios and thicknesses were tested at transonic speeds. The correlations of the lift depending wave drag and the lift parameter for...
report 1982
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Consigny, H. (author), Chan, C.K. (author), Richards, B.E. (author)
This note presents measurements of heat transfer to a cold surface at conditions simulating advanced aircraft gas turbine flow conditions. They were obtained under isothermal wall conditions in a short duration isentropic light piston tunnel using surface temperature transient techniques. The effects of external turbulence and strong favourable...
report 1979
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Chan, Y.Y. (author)
This report gives the detailed analysis of the nonlinear development of a spatial-growth wave disturbance in the turbulent shear layer of a circular jet. A concise version of the present problem has been published in the Physics of Fluids (Ref. 2). The method of analysis is based on the global consideration of the energy transfer between the...
report 1975
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Chan, Y.Y. (author)
The experimental investigation of CAST 10-2/DOA 2 supercritical airfoil previously conducted in the NAE Two-Dimensional Test Facility has been extended to low Reynolds number range at the design Mach number 0.765. The results indicate that with forward transition fixing, the data trend at low Reynolds number is different from that at high...
report 1989
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Chan, Y.Y. (author)
The effects on aerodynamic performance of a supercritical airfoil applying disk or grit tripping for boundary layer transition has been investigated for a typical supercritical airfoil at transonic speeds. It is observed that by allowing the laminar flow passing through the space between the disks, transition takes place a short distance...
report 1988
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Chan, Y.Y. (author)
The experimental study of the transonic equivalence rule with lift, previously reported in Reference 1, has been extended to include a configuration of swept-back wing-body and the corresponding equivalent bodies for lift and zero-lift. For zero lift, the wing-body is shown to have higher wave drag than that of the equivalent body. At lifting...
report 1984
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Chan, Y.Y. (author)
The wind tunnel wall interference in transonic speed is formulated as a perturbation to the basic flow around the airfoil in free air. The perturbation equation is derived from the transonic small disturbance equation and is linear but with variabie coefficients containing the non-linear solution of the basic flow. The equation is solved...
report 1979
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Ohman, L.H. (author), Brown, D. (author), Chan, Y.Y. (author), Galway, R.D. (author), Hashim, S.M. (author), Khalid, M. (author), Malek, A. (author), Mokry, M. (author), Tang, N. (author), Thain, J. (author)
The NAE 5ftx5ft blowdown wind tunnel has undergone a major upgrade of its transonic testing capabilities. Two entirely new test sections, one for testing two-dimensional models (2D) and one for testing three-dimensional models and reflection plane models (3D), have been constructed. The two test sections are parts of the so-called Roll-in Roll...
report 1990
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Chan, Y.Y. (author)
A computational method for turbulent boundary layers in an incompressible two-dimensional flow has been formulated. The governing differential equations for the mean flow are solved by an implicit finite difference method. The Reynolds shear stress is correlated by Prandtl's mixing length concept. Four models of correlation for the mixing length...
report 1970
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Chan, Y.Y. (author)
Three-dimensional luminar incompressiblc boundary layers with suction and normal injection are examined. Similarity flows arc considered and similar solutions are obtained numerically. Resul ts show that the cross-flows and, hence, the three-dimensional behaviour of the boundary layer are greatly reduced when sudion is applied, and inversely,...
report 1967
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Chan, A.S.L. (author)
The fundamental problem of structural design is the deternaination of structures of minimum weight which safely equilibrate a given system of external forces. The classical theorem of Michell gave the basic requirements for such a structure. The first part of this paper analyses the geometrical layout of two-dimensional structures which satisfy...
report 1960
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