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Mechanical Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

1993

Aerospace engineering

Articles 1 - 2 of 2

Full-Text Articles in Mechanical Engineering

A Numerical Investigation Of Laminar Airfoil Stall , Daniel Wayne Black Jan 1993

A Numerical Investigation Of Laminar Airfoil Stall , Daniel Wayne Black

Retrospective Theses and Dissertations

The details of an interacting boundary layer algorithm capable of calculating large scale laminar separation past airfoils at low speeds is given. Rationale behind various convergence acceleration methods is given. It is shown that linear based acceleration methods are limited to 50% savings in convergence rate. A nonlinear extrapolation method is proposed and tested on two simple model problems. Savings exceed the 50% limitation of the previous methods. Boundary layer results for laminar flow past symmetric airfoils at zero incidence are presented as a test of the methods. Leading edge marginal separation results at finite Reynolds numbers are presented. Richardson ...


Computation Of The Integrated Aerodynamic And Propulsive Flowfields Of A Generic Hypersonic Space Plane , Ganesh Wadawadigi Jan 1993

Computation Of The Integrated Aerodynamic And Propulsive Flowfields Of A Generic Hypersonic Space Plane , Ganesh Wadawadigi

Retrospective Theses and Dissertations

A new upwind, parabolized Navier-Stokes (PNS) code has been developed to compute two- and three-dimensional (3-D) chemically reacting, turbulent flows with hydrogen-air chemistry. The code is a modification of the 3-D upwind PNS (UPS) airflow code. The code solves the PNS equations using a finite-volume, upwind, TVD (Total Variation Diminishing) method based on Roe's approximate Riemann solver that has been modified to account for nonequilibrium effects. The fluid medium is assumed to be a chemically reacting mixture of thermally perfect (but calorically imperfect) gases in thermal equilibrium. Two turbulence models have been incorporated into the code including an algebraic ...