Cold driven shock tube (CDST)
Cold Driven Shock Tube (CDST)
The TPSRG's Cold Driven Shock Tube (CDST) is a double diaphragm, reflected shock tube facility designed to provide controlled temperatures and pressures up to 1500 K and 150 bar.
The facility, housed in the University of Oxford's Osney Thermofluids Institute, was originally designed to support fundamental studies of liquid fuel spray and auto-ignition. It has more recently been used for the study of low-speed pre-ignition (LSPI) and is currently undergoing updates to allow the use of hydrogen gas experiments.
Details of the CDST initial design and development can be found in Camm et al., 2018
Specifications
- Nominal working length: 11m (extension to 13.5 m)
- Bore: 100 mm
- Choice of area change and constant area driver sections
- Max operating pressure: 150 bar
- Max operating temperature: 1500 K
- Optically accessible working section
Optical test section
The CDST's optical test section has been designed with maximum flexibility in mind. Three, flush fitted, orthogonal 70 x 30 mm fused silica windows allow the application of a variety of, typically laser based, visualization and measurement techniques. End caps are changed to suit the experiment, typically accommodating an axially located fuel injector (a simple knife edge arrangement used for powder dispersion is shown in the illustration to the right, STS indicates the position of high-speed pressure sensors).