A specially designed Doppler global velocimetry system (DGV, planar Doppler velocimetry) was tested in a high-speed cryogenic facility at Mach 0.3 to Mach 0.8 and pressures between 1.2 and 2.5 bar. The necessary seeding was achieved by injecting a mixture of gaseous nitrogen and water vapor into the dry and cold tunnel flow which then immediately formed a large amount of small ice crystals. As operational and access conditions are quite restrictive with respect to other facilities, DGV is currently considered the best choice for the non-intrusive measurement of flow fields. A comparison of DGV to the more wide-spread particle image velocimetry technique (PIV) is also given.
On the development of Doppler global velocimetry for cryogenic wind tunnels
2003-01-01
958731 byte
Conference paper
Electronic Resource
English
On the Development of Doppler Global Velocimetry for Cryogenic Wind tunnels
British Library Conference Proceedings | 2003
|Advances in Planar Doppler Velocimetry for Large-Scale Wind Tunnels
British Library Conference Proceedings | 2004
|Development of Doppler Global Velocimetry for Wind Tunnel Testing
British Library Conference Proceedings | 1994
|