ZAMANA BAĞLI SIKIŞTIRILAMAZ KAVİTE AKIŞININ AEROAKUSTİK ANALİZİ

Yıl 2016, , 0 - 0, 06.09.2016

Baha Zafer Furkan Çoşgun

https://doi.org/10.17341/gummfd.34239

Öz

Bu çalışmada, 2 ve 3 boyutlu kavite profili boyunca sıkıştırılamaz, zamana bağlı akış alanı ve aerodinamik kaynaklı aeroakustik gürültü incelenmiştir. 2 boyutlu akış alanının çözümünde türbülans modeli olarak standart k-ε, k-ω ve SST k-ω kullanılırken, 3 boyutlu çözümlerde ise k-ω modeli ile hesaplama alanı çözülmüştür. Düşük Reynolds ve Mach Sayısı için kavite içi ve çevresindeki hesaplanan akış alanı sonuçları deneysel çalışmalar ile karşılaştırılarak doğrulanmıştır. Hem 2 boyutlu hem de 3 boyutlu akış alanına ait zaman bağlı değişkenler, Ffowcs William-Hawkings (FW-H) Akustik Analoji yaklaşımı kullanılarak kavite gürültüsü hesaplanmıştır. 3 boyutlu kavite için, geçişli iç yüzey yaklaşımı kullanılarak quadrapol terimlerinin aeroakustik gürültü sonuçlarına etkisi gösterilmiştir.

Anahtar Kelimeler

Kavite Akışı, Aeroakustik; Düşük Reynolds Sayısı; Akustik Analoji

Kaynakça

• Lawson S.J. ve Barakos G.N., Review of numerical simulations for high-speed turbulent cavity flows, Progress in Aerospace Sciences, 47 ( 3), 186-216, 2011.
• Nakı̇boğlu G., Manders H.B.M. ve Hirschberg A., Aeroacoustic power generated by a compact axisymmetric cavity: prediction of self-sustained oscillation and influence of the depth, Journal of Fluid Mechanics, 703, 163- 191, 2012.
• Barone M.F. ve Srinivasan A., A Computational study of flow within cavities with complex geometric features, 53rd AIAA Aerospace Sciences Meeting, AIAA SciTech AIAA 2015-0008, 2015.
• Zhang S., Xuliang L., Hanxin Z. ve Chi-Wang S., High order and high resolution numerical schemes for computational aeroacoustics and their applications, Lecture Notes in Mechanical Engineering-Fluid-Structure-Sound Interactions and Control, 27-32, 2016.
• Lighthill M. J., On sound generated aerodynamically I. General theory, Proceeding Royal Society London A, 211, 564-587, 1952.
• Crook S. D., Lau T.C.W. ve Kelso R.M., Three-dimensional flow within shallow, narrow cavities, Journal of Fluid Mechanics, 735, 587-612, 2013.
• Temmerman L., Tartinville B. ve Hirsch C., URANS investigation of the transonic M219 cavity, Progress in Hybrid RANS-LES Modelling - Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 471-481, 2012.
• Ashworth R., Prediction of acoustic resonance phenomena for cavities detached eddy simulation, The Conference of Royal Aero Society- QinetiQ, UK, 2004.
• Liggett L.D. ve Smith M.J., Cavity Flow assessment using advanced turbulence methods, Journal of Aircraft, 48 (1), 141-156, 2011.
• Chen H., Zhong Q., Wang X., Li D., Reynolds number dependence of flow past a shallow open cavity, Science China Technological Sciences, 57 (11), 2161–2171, 2014.
• Kompenhans M., Ferrer E., Chavez M. ve Valero E, Numerical study of three dimensional acoustic resonances in open cavities at high Reynolds numbers, Aerospace Science and Technology, 45, 501–511, 2015.
• Haaban M. ve Mohany A., Passive control of flow‑excited acoustic resonance in rectangular cavities using upstream mounted blocks, Experimental Fluids, 56, 2015.
• Pey Y.Y. ve Chua L.P., Effects of trailing wall modifications on cavity wall pressure, Experimental Thermal and Fluid Science, 57, 250–260, 2014.
• Pey Y.Y., Chua L.P. ve Siauw W.L., Effect of trailing edge ramp on cavity flow structures and pressure drag, International Journal of Heat and Fluid Flow, 45, 53–71, 2014.
• Vikramaditya, N.S. ve Kurian, J., “Experimental study of influence of trailing wall geometry on cavity oscillations in supersonic flow”, Experimental Thermal and Fluid Science, Cilt: 54, 102–109, 2014.
• Martinez M.A., Di Cicca G.M., Iovieno M. ve Onorato M., Control of Cavity Flow Oscillations by High Frequency Forcing, Journal of Fluids Engineering, 134, 128-139, 2012.
• Fuglsang D.F. ve Cain A.B., Evaluation of shear layer cavity resonance mechanisms by numerical simulation, 30. AIAA Aerospace Scientific Meeting Exhiation, Reno Nevada -USA, 1992.
• Sridhar V., Kleine H. ve Gai S.L., Visualization of wave propagation within a supersonic two-dimensional cavity by digital streak schlieren, Experiments in Fluids, 56:152, 2015.
• Laiping Z., Ming L., Wei L. ve Xin H., An implicit algorithm for high-order DG/FV schemes for compressible flows on 2D arbitrary grids, Communications in Computational Physics, 17 (1), 287-316, 2015.
• FLUENT Theory Guide14.0, 2013.
• Wilcox D.C., Turbulence Modeling for CFD, 3. Baskı, DCW Industries, Inc., La Canada, 2006.
• Özsoy E., Rambaud R., Stitou A. ve Riethmuller M.L., Vortex characteristics in laminar cavity flow at very low Mach number, Experiments in Fluids, 38, 133-145, 2005.
• Özsoy E. ve Aslan A.R., Üç boyutlu bir kavite üzerindeki sıkıştırılamaz akışın sayısal bir yöntemle analizi, İTÜ Dergisi/D Mühendislik, 10 (3), 149-159, 2011.
• Ffowcs Williams J.E. ve Hawkings D.L., Sound generation by turbulence and surfaces in arbitrary motion, Philosophical Transcation Royal Society Series A, 264, 321-342, 1969.
• Peng S.H. ve Leicher S., DES and hybrid RANS-LES modelling of unsteady pressure oscillations and flow features in a rectangular cavity, Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 97, 132–141, 2008.
• X Gloerfelt Cavity Noise, VKI Lecture Series, Brussels, Belgium, 2009.
• Ünalmis Ö.H., Clemens N.T. ve Dolling D.S., Cavity oscillation mechanisms in high-speed flows, AIAA Journal, 42 (10), 2035-2041, 2004.