Kare kesitli engellerle donatılmış kanal akışının PIV yöntemiyle deneysel olarak incelenmesi

Bu çalışmada kare kesitli engellerle donatılmış bir kanal içerisindeki akış yapısı parçacık görüntülemeli hız ölçme yöntemi (PIV) kullanılarak deneysel olarak incelenmiştir. Zaman ortalama, anlık akış alanları ve türbülans istatistikleri üç farklı Reynold sayısı Re=2900, 8400 ve 15000 için detaylı olarak sunulmuştur.

Anahtar Kelimeler:

kanal akışı, kare kesitli engeller, Akış ayrılması, PIV

Experimental investigation of the channel flow equipped with rectangular obstacles by means of PIV method.

The characteristics of the flow fields in a rectangular channel equipped with cylindrical ribs were examined through particle image velocimetry (PIV) experiments. The mean and instantaneous flow fields and turbulence statistics were presented for three Reynolds numbers of 2900, 8400 and 15000 in detail.

Keywords:

flow separation, PIV, Channel flow, rectangular obstacles,

PDF

___

[1]. Perry A.E., Schofield W.H., Joubert P.N., Rough wall turbulent boundary layers. J Fluid Mech 1969; 37:383-413.
[2]. Antonia, R., Luxton, R.E., The response of a turbulent boundary to an upstanding step change in surface roughness. ASME J. Basic Eng. 1971; 93: 22-34.
[3]. Hanjalic, K., Launder, B.E., Fully developed asymmetric flow in a plane channel. J. Fluid Mech. 1972: 51, 301-335.
[4]. Siuru, W.D., Logan Jr., E., Response of a turbulent pipe flow to a change in roughness. J. Fluids Eng. 1977; 99: 548-555.
[5]. Durst, F., Founti, M., Obi, S., Experimental and computational investigation of the two-dimensional channel flow over two fences in tandem. J. Fluids Eng. 1988; 110: 48-54.
[6]. Ciofalo, M., Collins, M.W., Large-eddy simulation of turbulent flow and heat transfer in plane and rib-roughened channels. Int. J. Numer. Methods Fluids 1992; 15: 453-489.
[7]. Liou, T.M., Hwang, J.J., Chen, S.H., Simulation and measurement of enhances turbulent heat transfer in a channel with periodic ribs on one principal wall. Int. J. Heat Mass Transfer 1993; 36: 507–517.
[8]. Liou, T.M., Wu, Y.Y., Chang, Y., LDV measurements of periodic fully developed main and secondary flows in a channel with rib-distributed walls. J. Fluids Eng. 1993; 115: 109–114.
[9]. Cui J., Patel V.C., Lin C.L. Large-eddy simulation of turbulent flow in a channel with rib roughness. Int J. Heat Fluid Flow 2003; 24(3): 372–388.
[10]. Casarsa L., Arts T. Experimental Investigation of the aerothermal performance of a high blockage rib-roughened cooling channel. Journal of Turbomachinery 2005; 127: 580-588.
[11]. P. Promvonge, C. Thianpong, Thermal performance assessment of turbulent channel flow over different shape ribs. International Communications in Heat and Mass Transfer 2008; 35(10): 1327–1334.
[12]. Wang L., Hejcik J., Sunden B., PIV measurement of separated flow in a square channel with streamwise periodic ribs on one wall. J. Fluid Eng. 2007; 129: 834–841.
[13]. Cardwell, N. D., Vlachos, P. P., and Thole, K. A., Developing and Fully Developed Turbulent Flow in Ribbed Channels. Experiments in Fluids 2011; 50: 1357-1371.
[14]. Sunden D., Convective heat transfer and fluid flow physics in some ribbed ducts using liquid crystal thermography and PIV measuring techniques. Heat Mass Transfer 2011; 47: 899-910.
[15]. Coletti F., Maurer T., Arts T., Flow field investigation in rotating rib-roughened channel by means of particle image velocimetry. Exp. Fluids 2012; 52: 1043-1061.
[16]. Gurlek C., Study of the flow around a bus model, Çukurova University, May 2008.