WorldCat Identities

Zakkay, V.

Overview
Works: 31 works in 44 publications in 1 language and 277 library holdings
Genres: Conference papers and proceedings 
Roles: Editor, Author, Other
Publication Timeline
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Most widely held works by V Zakkay
Supersonic flow chemical processes and radiative transfer by D. B Olfe( Book )

8 editions published in 1964 in English and held by 228 WorldCat member libraries worldwide

Mixing problems with chemical reactions by V Zakkay( Book )

1 edition published in 1963 in English and held by 4 WorldCat member libraries worldwide

Turbulent boundary layer-shock interaction with and without injection by Edgar Alzner( Book )

3 editions published in 1970 in English and held by 4 WorldCat member libraries worldwide

Experimental results of turbulent boundary layer-shock interaction at Mach 6 using a 10 deg axisymmetric wedge around an axisymmetric centerbody are presented and an effort is made to obtain a simple numerical solution of this problem by the time dependent unsteady method. Static pressure, pitot pressure and total temperature profiles, wall static pressure, heat transfer measurements and optical data were obtained. Air and hydrogen are injected to study their effects on the interaction region. Wall heat transfer and pressure distributions for different injection rates of both air and hydrogen are presented. Detailed mappings of Mach number, pressure distributions and shock wave locations are derived for the air injection as well as the no injection case. Experimental results show a natural boundary layer thickness of about .85 inches, a separated flow region about two inches long and a pressure plateau characteristic of turbulent flow. (Author)
Turbulent slot injection studies at mach 6 by Krishnamachar Parthasarathy( Book )

3 editions published in 1969 in English and held by 4 WorldCat member libraries worldwide

The use of film cooling for protecting a surface exposed to high temperature air at hypersonic speeds is investigated experimentally. The purpose of the work is to investigate the effects of injecting a coolant on the surface of a hypersonic vehicle in the turbulent boundary layer, and to try to obtain correlation parameters as well as the effective cooling lengths. The tests were conducted in a Mach 6 contoured axisymmetric nozzle with a streamlined centerbody. The Reynolds number in the test section was in the range of 2-3.6 x 10 to the 6th power per inch. Heat transfer distributions were obtained for various injection mass flow rates and the effect of injection on the velocity, temperature and Mach number profiles was studied. Correlations for the adiabatic wall temperatures with injection rates were obtained. Skin friction coefficients were obtained using Baronti-Libby transformations into the incompressible plane. The measured transient heat transfer rates obtained by the thinskin techniques agree with the values predicted by the flat plate reference enthalpy method for the case of no injection. (Author)
Theoretical and experimental investigation of supersonic combustion by Antonio Ferri( Book )

2 editions published in 1962 in English and held by 3 WorldCat member libraries worldwide

A theoretical and experimental investigation of mixing and supersonic combustion is presented. A review of the problem under investigation is given. Then an analysis of inviscid flow fields with a finite rate chemistry for a hydrogen-air reaction is presented, an an analysis of a turbulent mixing for flows with large density gradients with no chemical reaction is presented. The analysis is compared wit the experimental results. Results of the experiments in upersonic combustion are presented. (Author)
A new concept in heater design by V Zakkay( Book )

1 edition published in 1968 in English and held by 3 WorldCat member libraries worldwide

The feasibility of designing high pressure (30,000 p.s.i.) high temperature (4000R) heaters for running times between 10 and 15 seconds is discussed in detail. Preliminary designs for three different concepts are then presented, and an analysis of the performance characteristics of each of the designs is carried out. The results indicate that a cored brick heater with a coaxial arrangement for the bricks, and with one-half the amount of insulation required for standard heaters is a feasible design for heating air. An alternate design for a heater utilizing tungsten mesh screens is also presented for preheating nitrogen. (Author)
Fluid dynamics of a fluidized bed packed with heat exchangers : final report( Book )

2 editions published in 1981 in English and held by 3 WorldCat member libraries worldwide

The flow about the leading edge of a swept blunt plate at hypersonic speeds by C. C Horstman( Book )

1 edition published in 1962 in English and held by 2 WorldCat member libraries worldwide

Two-Dimensional Turbulent Boundary Layer Separation on a Flat Plate with Ramp at Freestream Mach Numbers of 3.7 and 6.3 in Supersonic and Hypersonic Flow by V Zakkay( Book )

1 edition published in 1975 in English and held by 2 WorldCat member libraries worldwide

This investigation describes surface pressure distribution, heat transfer, and turbulent flow separation and reattachment on a flat plate with variable ramp angle at Mach numbers averaging 3.66 and 6.30. The freestream Reynold's number varied from 3.33 to 8.34 million per foot for the former case and from 5.243 million to 14.6 million per foot for the latter case. Ramp angle was varied from 0 to 35 degrees for these experiments. Stagnation temperatures averaged 849 degrees Rankine, with wall temperature assumed constant at 535 degrees Rankine for all tests. The knowledge of effective wedge angles and freestream conditions makes it possible to determine shocks so that conditions can be evaluated at all positions on the model
An experimental investigation of the near wake of a slender cone at M[ach]=8 and 12 by Robert J Cresci( Book )

1 edition published in 1965 in English and held by 2 WorldCat member libraries worldwide

Hypersonic shock layer at low reynolds number - the yawed cylinder by H. K. Cheng( Book )

1 edition published in 1962 in English and held by 2 WorldCat member libraries worldwide

Low-density hypersonic flows are studied theoretically using the concept of a thin shock layer. The approach is applied to the problem of a cylinder at yaw, and to the analyses of vorticity interaction in the stagnation region for both axisymmetric and plane flows. A detailed discussion of the basic flow model is also made. Numerical solutions are obtained for yawed cylinders in the leading-edge region. The calculation encompasses a regime of rarefaction corresponding to both small and large departures from the boundary-layer solutions, and covers a range of sweep angle from 0 to 60 degrees. Solutions obtained reveal the existence of an independence principle which provides a way of correlating flow fields around cylinders at different yaw angles and Reynolds numbers. For the higher Reynolds number regime (which includes the vorticity-interaction as well as the viscouslayer regimes) vorticity-interaction theories based on the boundary-layer approximation are shown to be applicable in the stagnation region for both axisymmetric and plane flows. The results obtained are compared with results from other theories, and their differences are examined. (Author)
High mach number turbulent boundary layer with and without favorable pressure gradient by Chi R Wang( Book )

1 edition published in 1975 in English and held by 2 WorldCat member libraries worldwide

A review of the work performed at the Polytechnic Institute of Brooklyn Aerospace Institute under contract AF 33(616)-7661 by Antonio Ferri( Book )

1 edition published in 1963 in English and held by 2 WorldCat member libraries worldwide

Laminar, transitional and turbulent flow with adverse pressure gradient on a cone-flare at Mach 10 by V Zakkay( Book )

1 edition published in 1965 in English and held by 1 WorldCat member library worldwide

The radial variation of the eddy viscosity in compressible turbulent jet flows by V Zakkay( Book )

1 edition published in 1965 in English and held by 1 WorldCat member library worldwide

Experimental Investigation of the Hypersonic Flow Over a Six Finned Configuration( Book )

1 edition published in 1987 in English and held by 1 WorldCat member library worldwide

Experimental data of the flow field over a six-finned configuration are compared with computations from an inviscid Euler and a parabolized Navier-Stokes (PNS) code to assess their accuracy. The experiments were conducted with a smooth and a grooved cylinder in a hypersonic (M=6.5) wind tunnel. Surface oil flow patterns, surface pressures, local heat flux rates and flow field pitot surveys are presented. The PNS computations are in good agreement with the measurements in the viscid regions. However, significant differences are noted in the viscous regions possibly due to nose tip bluntness effects and the associated entropy layer. Keywords: Hypersonic, Aerodynamics, Fluid mechanics, Navier Stokes, Code validation, Finned configuration, Experiment
Residence time within a wake recirculation region in an axisymmetric supersonic flow by V Zakkay( Book )

1 edition published in 1970 in English and held by 1 WorldCat member library worldwide

Numerical solution of several steady wake flows of the mixed supersonic/subsonic type by a time-dependent method and comparison with experimental data by John I Erdos( Book )

1 edition published in 1969 in English and held by 1 WorldCat member library worldwide

A High Reynolds Number Facility for Operation at 10,000 PSI and 3500 R by V Zakkay( Book )

1 edition published in 1971 in English and held by 1 WorldCat member library worldwide

The design of a cored brick air heater, moderately high density aluminum oxide possessing a porosity of approximately 30% to operate at a pressure of 10,000 psi, has been completed. The heater supplies 50 lb/sec of air at discharge temperature greater than 3500 degrees R, with a maximum temperature variation of 100 degrees R over a 15 sec running time. Various types of heater vessel construction were considered before the final selection of a forged vessel was made (all vertical configurations). Press closures have been utilized to permit rapid heater operation and coolant passages have been placed along the full length of the heater core. The passages contribute to a reduced insulation thickness (5 inches versus 10 inches to a foot or more in existing units) and provide an initial preheat to the incoming air during the heater blowdown, thereby effecting a reduction in heater length as well as avoiding the use of alumina at very low temperatures where brittleness is extreme. This novel design results in a savings of roughly 40% as regards the pressure vessel size, and the total cost of the heater is reduced by a similar amount. (Author)
The optimization of heat exchanger solidity for coal-fired fluidized bed combustors by Gabriele Miller( Book )

1 edition published in 1979 in English and held by 1 WorldCat member library worldwide

 
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Audience Level
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  Kids General Special  
Audience level: 0.67 (from 0.60 for Fluid dyna ... to 0.99 for Experiment ...)

Languages
English (33)