Accession Number : ADA137018

Title :   An Investigation of New Possibilities to Simplify the Standard Supersonic Area Rule.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Nikolic,V R

PDF Url : ADA137018

Report Date : Dec 1983

Pagination or Media Count : 101

Abstract : An investigation was conducted to find out whether there are possibilities to construct a procedure capable of giving reasonably accurate results for the aircraft wave drag coefficient over a range of Mach numbers or, at least, to predict the wave drag changes due to configuration changes. The idea was to build an algorithm starting from the standard supersonic area rule but employing different definitions for the area distribution along the longitudinal axis as applied to the equivalant body of revolution. Instead of using the set of planes tangent to the characteristic Mach cones, lateral surfaces of the cones were used. A computer program to perform the calculations following the procedure proposed was written. Several aircraft configurations were investigated by employing the developed method and very promising results for a particular type of supersonic aircraft configuration at moderate supersonic speeds were obtained. When applied to predict the wave drag of a configuration employing a thin wing of small aspect ratio centrally mounted on a slender fuselage at Mach numbers between 1.4 and 2.0, the method gave results within a range of ten percent accuracy.

Descriptors :   *Aerodynamic configurations, *Aerodynamic drag, *Supersonic aircraft, Algorithms, Computer programs, Supersonic characteristics, Coefficients, Thin wings, Aspect ratio, Slender bodies, Fuselages, Mathematical prediction, Approximation(Mathematics), Mathematical models, Simplification, Supersonic flow, Waves, Pressure, Thickness, Lift, Theses

Subject Categories : Aircraft
      Theoretical Mathematics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE