Author: Jassim A. Al-SaadiPublisher:
ISBN:
Category : Transonic wind tunnels
Languages : en
Pages : 82
Book Description
Wall Interference and Boundary Simulation in a Transonic Wind Tunnel with a Discretely Slotted Test Section
Author: Jassim A. Al-SaadiPublisher:
ISBN:
Category : Transonic wind tunnels
Languages : en
Pages : 82
Book Description
Wall Interference and Boundary Simulation in a Transonic Wind Tunnel with a Discretely Slotted Test Section
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781722867805
Category :
Languages : en
Pages : 78
Book Description
A computational simulation of a transonic wind tunnel test section with longitudinally slotted walls is developed and described herein. The nonlinear slot model includes dynamic pressure effects and a plenum pressure constraint, and each slot is treated individually. The solution is performed using a finite-difference method that solves an extended transonic small disturbance equation. The walls serve as the outer boundary conditions in the relaxation technique, and an interaction procedure is used at the slotted walls. Measured boundary pressures are not required to establish the wall conditions but are currently used to assess the accuracy of the simulation. This method can also calculate a free-air solution as well as solutions that employ the classical homogeneous wall conditions. The simulation is used to examine two commercial transport aircraft models at a supercritical Mach number for zero-lift and cruise conditions. Good agreement between measured and calculated wall pressures is obtained for the model geometries and flow conditions examined herein. Some localized disagreement is noted, which is attributed to improper simulation of viscous effects in the slots. Al-Saadi, Jassim A. Langley Research Center...
Scientific and Technical Aerospace Reports
Author: Wind Tunnel Wall Correction
Author: B. F. R. EwaldPublisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 578
Book Description
This report was compiled by an international team of wind tunnel wall correction experts. It presents the present state of the art in wind tunnel wall corrections with a special emphasis given to the description of modern wall correction methods based on Computational Fluid Dynamics. This AGARDograph was planned by the AGARD Fluid Dynamics Panel to be a modern sequel of the successful AGARDograph 109 "Subsonic Wind Tunnel Wall Corrections", which was published in 1966. AGARDogaph 109 is still valid and continues to be used to provide wall corrections in many wind tunnels. Nevertheless, in the thirty two years since the publication of AGARDograph 109, much work has been done on the subject, and the influence of the new tool of numerical fluid dynamics was so strong, that a sequel to AGARDograph 109 was considered to be necessary.
Aerodynamics of Wind Tunnel Circuits and Their Components
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Fluid Dynamics Panel. SymposiumPublisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 452
Book Description
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