Computational study of afterbody effects for the joint direct attack munition (JDAM)

Autor:	T. L. Donegan, J. H. Fox, Carl Bangasser
Rok vydání:	1998
Předmět:	Engineering business.industry Turbulence Flow (psychology) Reynolds number Structural engineering Computational fluid dynamics Physics::Fluid Dynamics symbols.namesake Boundary layer symbols business Navier–Stokes equations Joint (geology) Wind tunnel
Zdroj:	16th AIAA Applied Aerodynamics Conference.
DOI:	10.2514/6.1998-2799
Popis:	Computational analysis of a JDAM in the MTO= 0.9 to 1.4 flow regime determined the effect of changes to the store afterbody and support sting on store loads. The computational results compared well to three sets of wind tunnel data. Accuracy requirements necessitated both that the store geometry be modeled with exceptional detail, and that the Navier-Stokes equations with the Nichols1 k-e turbulence model be employed. Comparisons to measured data showed excellent agreement with aerodynamic load increments and also with the absolute values of the loads. Analysis using a wall function model for the boundary layer also compared well with data. The comparisons established a sufficient level of confidence in the numerical model as to allow its use in determining the forces and moments free of support effects at the flight Reynolds number.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3286a89ce7780fc859d4f6c0fbf255a5 https://doi.org/10.2514/6.1998-2799 Zobrazit plný text záznamu