T5 Hypervelocity Shock Tunnel H. G. Hornung^, J. E. Shepherd^ N. J. Parziale*, J. S. Jewell* California Institute of Technology ^Professors *Grad Students 11/9/2010GALCIT - T5 Hypervelocity Shock Tunnel1

11/9/2010GALCIT - T5 Hypervelocity Shock Tunnel2 T5 facility at GALCIT is a free piston shock tunnel Uniqueness of the facility is the ability to study the chemical and thermodynamic non- equilibrium effects relevant in high speed flight Capable of producing flows of up to specific reservoir enthalpy of 25 MJ/kg, pressure of 100 MPa, and temperature K Recent work for NASA includes heat transfer data on the CEV and MSL forebodies T5 Background

Flow Visualization From T5 Shock wave interaction in hypervelocity flow. Air flow is left to right. Image is a holographic shadowgraph. Thesis work by S. R. Sanderson. Transition on a 5 degree half angle cone in hypervelocity flow. Nitrogen flow is right to left. Image is a near-resonantly enhanced shadowgraph. Thesis work P. Germain. Hypervelocity flow over a sphere. CO2 flow is left to right. Image is a finite fringe differential interferogram. Thesis work by C. Y. Wen. 11/9/2010GALCIT - T5 Hypervelocity Shock Tunnel3

Some Current Work in T5 Near-resonantly enhanced focused schlieren deflectometry of hypervelocity boundary layers. Ongoing thesis work by N. J. Parziale. Hypervelocity boundary layer transition delay by CO2 in vibrational non- equilibrium. Ongoing thesis work by J. S. Jewell 11/9/2010GALCIT - T5 Hypervelocity Shock Tunnel4