%0 Journal Article
%T Experimental and Numerical Investigation of Swirling Flow on Triple Elbow Pipe Layout
%A Hideharu Takahashi
%A San Shwin
%A Ari Hamdani
%A Nobuyuki Fujisawa
%A Hiroshige Kikura
%J Journal of Flow Control, Measurement & Visualization
%P 45-62
%@ 2329-3330
%D 2020
%I Scientific Research Publishing
%R 10.4236/jfcmv.2020.82003
%X The secondary flow downstream of a triple elbow layout was studied experimentally and numerically to visualize the flow behavior under swirling inlet flow conditions. The inlet swirling condition was generated by a swirl generator, consisting of a rotary pipe and honeycomb assembly. The experiments were carried out in turbulent water flow condition at Reynolds number Re = 1 ¡Á 10<sup>4</sup> and inlet swirl intensity <em>S</em> = 1. Ultrasonic measurements were taken at four locations downstream of the third elbow. The two-dimensional velocity field of the flow field was measured using the phased array ultrasonic velocity profiler technique to evaluate the flow field with separation. Furthermore, a numerical simulation was performed and its results were compared with the experimental data. The numerical result was obtained by solving three-dimensional, Reynolds-averaged Navier-Stokes equations with the renormalization group <em>k-¦Å</em> turbulence model. The experimental results confirmed that the swirling flow condition modified the size of the separation region downstream of the third elbow. A qualitative comparison between the experimental and CFD simulation results of the averaged velocity field downstream of the third elbow showed similar tendency on reverse flow.
%K Swirling Flow
%K Triple Elbow
%K Ultrasound
%K Phased Array Sensor
%K Velocity Profile
%K CFD
%K Numerical Simulation
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=100231