Another part, vaing a water circulation system of 0.6 m3/s in discharge can be used for conducting local model tests of high head dam spillways and outlet works. Several high-head tanks are available to supply constant high head water flow.
Main parameters
of high speed water tunnel
| Purpose | For cavitation research | |
| Test section | Dimensions | 30cm x 30cm x 300cm |
| Max. velocity | 35m/s | |
| Max. Reynolds number | 1 x 107 | |
| Range of pressure variation | -1 - +4kg/cm2 | |
| Tunnel loop | Horizontal length | 18.5m |
| Vertical height | 10.0m | |
| Contraction ratio of nozzle | 1:16 | |
| Diverging angle of diffuser | 7o | |
| Drive system | Two-stage mixed flow pump | |
| Max. head | 20.7m | |
| Max. discharge | 3.6m3/s | |
| Max. capacity of motor | 932kw | |
| Auxiliaries | Air resorber | D max. 3.6m |
| P max. 12kg/cm2 | ||
| Mechanical filter | D 1.5m | |
| Qf 10m3/hr | ||
| Degassing tower | D 1.5m | |
| Qt 50 m3/hr | ||
| Pressurized and
depressurized system |
+12 kg/cm2 - -1kg/cm2
|
Main parameters
of the large size vacuum tank
| Purpose | For cavitation research on | hydraulic structure |
| Dimension | Total length | 19.22m |
| Width of the test section | 1.0m | |
| Height of the upper tank | 3.3m | |
| Height of the lower tank | 2.7m | |
| Total volume capacity | 90 m3 | |
| Max. head | ||
| Max. discharge | ||
| Max. power capacity | of drive system | 185 kw |
| Max. vacuum pressure | level: | 98.7% |
| Photo:(1)High speed w | ater tunnel | |
| (2)Large size va | cuum tank |
| China Institue of Water Resources and Hydropower Research
Dept. of Hydraulics / Research Center of Disaster Tel.+86-10-68515511-1053,1594 Fax.+86-10-68538685 |