Computation of viscous axisymmetric transonic flow using cartesian grids

Singh, JP (1989) Computation of viscous axisymmetric transonic flow using cartesian grids. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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Abstract

A code has been developed to compute axisymmetric Viscous13; transonic flow. An important feature of the method is that it uses a cartesian grid in computational plane. A cartesian grid stretching appropriate for axisymmetric flow computation was developed. The problem is formulated13; using full potential equation i'n conjunction with Jameson's rotated difference scheme. Care has been taken to handle axisymmetric terms on the axis in the flowfield. An effective extrapolation scheme required to incorporate the surface boundary condition has been developed. The resulting diference equations,' are solved using SLOR technique on the cartesian grid.'Green's lag entrainment method is used to compute boundary layer. The standard viscous-inviscid iteration is used to consider the viscous correction. The code can handle a wide variety of axisymmetric configurations like sharp or blunt nose* shoulders, kinks, boattails bodies with or without sting and wavy conturs. The freestream Mach numbers can be subsonic or supersonic. The computed, pressure distributions and wave drag over a variety of axisymmetric configurations are in statisfactory agreement with the experimental data.

Item Type:	Monograph (Technical Report)
Uncontrolled Keywords:	Transonic flow;Axisymmetric flow;Wave drag
Subjects:	ENGINEERING > Fluid Mechanics and Thermodynamics
Depositing User:	Poornima Narayana
Date Deposited:	17 Jul 2006
Last Modified:	24 May 2010 04:14
URI:	http://nal-ir.nal.res.in/id/eprint/1920

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