Numerical solution of flow fields around delta wings using euler equation method. Part II: Analysis of the results and comparison with experiments

Das, A and Kumar, A (1987) Numerical solution of flow fields around delta wings using euler equation method. Part II: Analysis of the results and comparison with experiments. Technical Report. National Aeronautical Laboratory, Bangalore, India.

Full text available as:
[img] PDF
Restricted to Archive staff only

Download (973Kb)

    Abstract

    Extensive analysis of the inviscid flow fields around a delta wing was carried out i n the DFVLR, Draunschweig by applying Euler finite volume method. While the details of the numerical method have been reported in Part I (NAL TM FM 8701), the objective of this paper is to present13; further results concerning pressure distributions and vortex lifts of delta wings with sharp and round leading edges, the corresponding circulation distributions over the wing span, the cross flow fields, the pressure contours13; on the wing surface and the resulting lift, drag and moment acting on the wing.The parameter variation includes two onflow Mach numbers of M = 0.4 and 0.85- and angles of incidence ranging from = 0quot; to 30quot;. Hence the analysis could clearly depict the setting in of vortex lift and then13; the fall of it at high incidence. The accompanying changes in the cross flow field with spiraling vortices could be followed up for all flow conditions. The analysis confirms that the fall of vortex lift of a delta wing13; is primarily an inviscid phenomenon. Finally some comparisons of the pressure and force coefficients of the delta wing have been made with the experimental results which reveal the extent of agreement and the nature of differences which are t o be expected from the viscous effects in a real medium.

    Item Type: Proj.Doc/Technical Report (Technical Report)
    Uncontrolled Keywords: Delta wings;Euler equation method
    Subjects: ENGINEERING > Fluid Mechanics and Thermodynamics
    Division/Department: Other, Fluid Dynamics
    Depositing User: M/S ICAST NAL
    Date Deposited: 27 Sep 2006
    Last Modified: 24 May 2010 09:51
    URI: http://nal-ir.nal.res.in/id/eprint/2824

    Actions (login required)

    View Item