Dept of Mechanical & Aerospace Engineering Seminar

Category: Seminar

For: Academic staff, Researchers staff

5 November 2009
4pm - 5pm
Room S4, Building 25, Clayton campus

Planar Laser-Induced Fluorescence Imaging in Shock Tube Flows

D. Mitchell
High Temperature Gas Dynamics Laboratory,
Department of Mechanical Engineering,
Stanford University

Planar laser-induced fluorescence (PLIF) imaging was initially validated for quantitatively measuring temperature fields within shock tube flows using toluene (C6H5CH3). This method is used to visualize uniform and non-uniform flow fields and measure temperature distribution in shock tube flow fields. Experiments were performed in square cross-section shock tube (10 x 10cm) using nitrogen premixed with 0.5 ~ 5% toluene. Measurements taken in the core flow behind incident and reflected shocks ranged 300 – 850K and the pressure ranged 0.15 – 1.5 atm. The temperature field measurements agreed within 2% and 4% of the predicted values behind the incident and the reflected shock respectively. This technique was then applied to study more complex supersonic flows such as single mach reflection by imaging flows over a wedge and comparing them with numerical simulations. Further measurements were performed on the sidewall viscous boundary layer, the endwall thermal layer, and the bifurcation of the reflected shockwave.

Attachment:  Mitchell (pdf, 20kb)

Enquiry:   Adrian Neild | 54655