Accession Number : ADA264704


Title :   Computation of a Delta-Wing Roll-and-Hold Maneuver


Descriptive Note : Final rept. 1 Feb 1992-1 Feb 1993


Corporate Author : WRIGHT LAB WRIGHT-PATTERSON AFB OH


Personal Author(s) : Gordnier, Raymond E ; Visbal, Miguel


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a264704.pdf


Report Date : Feb 1993


Pagination or Media Count : 46


Abstract : This report presents computations of the flowfield around an 80 degree sweep delta wing undergoing a constant roll-rate maneuver from 0 to 45 degrees. The governing equations for the problem are the unsteady, three- dimensional Navier-Stokes equations. The equations are solved using the implicit, approximately-factored algorithm of Beam-Warming. Fixed roll angle results are also presented and compared with experimental measurements to demonstrate the ability of the numerical technique to accurately capture the flowfield around a rolled delta wing. The dynamic behaviors of the vortex position and strength, as well as their corresponding effect on surface pressure, lift and roll moment, are described. A simple, quasi-static explanation of these vortex behaviors based on effective angle-of-attack and sideslip angle is proposed.... Delta wing roll, Vortex dynamics, Vortical flow, Unsteady maneuver


Descriptors :   *MANEUVERS , *UNSTEADY FLOW , *DELTA WINGS , ROLL , COMPUTATIONS , DYNAMICS , ATTACK , RATES , NAVIER STOKES EQUATIONS , LIFT , ANGLE OF ATTACK , THREE DIMENSIONAL , FLOW FIELDS , PRESSURE , SIDESLIP


Subject Categories : Aerodynamics
      Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE