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
01.01.2003
958731 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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
|