Computation of compressible flows through a chemical laser device with crossflow injection

Citation
Jh. Miller et al., Computation of compressible flows through a chemical laser device with crossflow injection, J PROPUL P, 17(4), 2001, pp. 836-844
Citations number
51
Categorie Soggetti
Aereospace Engineering
Journal title
JOURNAL OF PROPULSION AND POWER
ISSN journal
07484658 → ACNP
Volume
17
Issue
4
Year of publication
2001
Pages
836 - 844
Database
ISI
SICI code
0748-4658(200107/08)17:4<836:COCFTA>2.0.ZU;2-B
Abstract
The Air Force Research Laboratory has an ongoing effort to develop an accur ate and efficient computational tool to support the development of advanced chemical oxygen/iodine laser (COIL) devices. In this study, a series of co mputational simulations have been performed to provide a better understandi ng of fluid dynamic phenomena within geometries associated with COIL flowfi elds. The parallel, implicit unstructured Navier-Stokes code Cobalt(60) was used. to compute laminar, turbulent, and unsteady Rows of helium within th e research assessment and device improvement chemical laser (RADICL) nozzle , Computational results showing details of the jet mixing interaction and t opological structure are presented. The laminar and turbulent results obtai ned with Cobalt(60) are in excellent agreement with measured mass Row rates and surface pressure data obtained from recent cold-how tests performed wi th the RADICL device. Insufficient experimental measurement prevents the de termination of whether or nut transition occurs within the injector region. The laminar time-accurate results indicate small-scale unsteadiness in the frequency range of 200 kHz downstream of the nozzle throat.