000004862 001__ 4862
000004862 005__ 20141119144600.0
000004862 04107 $$aeng
000004862 046__ $$k2002-06-02
000004862 100__ $$aLee, Joseph H.W.
000004862 24500 $$aTHE VELOCITY FIELD OF A DUCKBILL VALVE (DBV) JET IN COFLOW

000004862 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004862 260__ $$bColumbia University in the City of New York
000004862 506__ $$arestricted
000004862 520__ $$2eng$$aA systematic three-dimensional numerical study using k-ε model and laboratory measurement by laser-doppler anemometry (LDA) on a duckbill valve (DBV) jet with varying large aspect ratios in coflow is presented. The numerical computations and LDA measurements show that: i) the jet spreading in the major and minor axes are distinctly different in the near-field; a strong “axis-switching” firstly appears in this region at X/D ≈ 1.5-2; ii) the velocity distribution in the major and minor axis planes can be well-approximated by a Gaussian distribution for X/D > 4; iii) the cross-sectional turbulent intensity distribution is double-peak shaped in the near field with maximum value of around 0.23.

000004862 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004862 653__ $$aduckbill valve (DBV) jet, laser-doppler anemometry (LDA), axis-switching, coflow.

000004862 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004862 720__ $$aLee, Joseph H.W.$$iKuang, C.P.$$iChan, H.C.
000004862 8560_ $$ffischerc@itam.cas.cz
000004862 8564_ $$s595410$$uhttps://invenio.itam.cas.cz/record/4862/files/445.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004862 962__ $$r4594
000004862 980__ $$aPAPER