Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Vorticity dynamics in isobarically closed porous channels part II: Space-reductive perturbations
Autore:
Majdalani, J; Roh, TS;
Indirizzi:
Marquette Univ, Dept Mech & Ind Engn, Milwaukee, WI 53233 USA Marquette Univ Milwaukee WI USA 53233 & Ind Engn, Milwaukee, WI 53233 USA CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA CALTECH Pasadena CA USA 91125 LTECH, Jet Prop Lab, Pasadena, CA 91125 USA
Titolo Testata:
JOURNAL OF PROPULSION AND POWER
fascicolo: 2, volume: 17, anno: 2001,
pagine: 363 - 370
SICI:
0748-4658(200103/04)17:2<363:VDIICP>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACOUSTIC BOUNDARY-LAYER; SOLID-PROPELLANT ROCKET; MOTORS; OSCILLATIONS; COMBUSTION; STABILITY; INJECTION; SCALES; FLOW;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Majdalani, J Marquette Univ, Dept Mech & Ind Engn, Milwaukee, WI 53233 USAMarquette Univ Milwaukee WI USA 53233 ilwaukee, WI 53233 USA
Citazione:
J. Majdalani e T.S. Roh, "Vorticity dynamics in isobarically closed porous channels part II: Space-reductive perturbations", J PROPUL P, 17(2), 2001, pp. 363-370

Abstract

In extending previous work this paper continues to address the acoustico-vortical coupling inside a porous channel of the closed-open type. The companion paper (Majdalani, J,. "Vorticity Dynamics in Isobarically Closed Porous Channels part I: Standard Perturbations:" Journal of Propulsion and Power, Vol, 17, No. 2) applies conventional perturbation principles to derive the temporal vorticity from the linearized vorticity transport equation. Two alternative efforts will be invested here to obtain the temporal velocity from the linearized momentum equation, These efforts rest on applying Wentzel, Kramers, and Brillouin (WKB) and multiple-scale expansions, The multiple-scale approach includes the innovative idea of introducing a virtually arbitrary scale that can be left unspecified during the derivation process. Atthe conclusion of the asymptotic analysis, this unknown variable is determined. The algebraic complexity of the resulting variable justifies the reverse engineering methodology adopted in its derivation. Its complexity stemsfrom its intrinsic function of singly representing a triple-deck structureof inner, intermediate, and outer length scales. This spatial scale reduction allows a conventional two-variable multiple-scale expansion to be successful, The emerging one-term formulation is conveniently short and accurate. Its simplicity enables us to obtain closed-form expressions for the velocity modulus and depth of penetration. Numerical verifications reveal that the error associated with this space-reductive perturbation solution is smaller than its precursors, namely, the standard perturbation solution of Paper I and the WKB solution furnished here. Most particularly, the asymptotic equations are found to agree very well with independently acquired computational data. The latter are obtained from a two-dimensional Navier-Stokes solver that handles the nonlinear conservation equations.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 14:24:30