Hypersonic Heat Exchange
Investigations of Heat Transfer
Heat transfer is investigated in the
Heat transfer in the
The main means of investigating heat transfer in
Investigations of Thermal Protection
- The wind tunnel
T-34equipped with a 10000 kW arc heater. The total temperature is up to 4000K, the total pressure is up to 40 bar, the test time is up to 180sec. The stagnation pressure ( pressure at the front model point) is up to 8 bar with the flow diameter of 100mm and 1 bar with the flow diameter of 200 mm.
- The wind tunnel
T-122equipped with a 1000kW arc heater. The total temperature is up to 5000K, the total pressure is up to 10 bar, the test time is up to 30 min. The heatshield panel under study can be installed in the nozzle wall. In this case, its sizes are as follows: 450 mm ( in the free-streamflow direction) by 200 mm, the thickness is up to 100mm, the surface temperature is up to 1300C, the surface pressure is 0.02 bar. The test panel can also be installed on the surface of a wedge introduced into the flow. Here, the panel sizes are 130 × 130 mm, the thickness is up to 60 mm, the surface temperature is up to 1600C, the surface pressure is up to 0.06 bar.
The wind tunnel is equipped with the device to provide a specified pressure distribution on the surface of the panel under study. This device is used for simulating the hot air flow in a porous
heat-shieldmaterial. Another device produces the pressure difference between the external and internal panel surfaces which makes it possible to evaluate the effectiveness of the seals commonly placed between the heatshield fragments.
- The wind tunnels
VAT-104and VTS equipped with high-frequencyinduction heaters with the power of, respectively, 240 kW and 860 kW, the flow diameter is 100 mm, the test time is up to 1 hour, the total temperature is up to 7000K, the total pressure is up to 0.7 bar, the stagnation pressure is up to 0.06 bar. Due to absence of electrodes in the heater, these facilities ensure a high air cleanliness and are used to investigate catalycity and chemical erosion of heat-shieldmaterials.
- A set of
thermo-vacuumchambers of various dimensions and levels of pressure and temperature in them ensures investigations of serviceability of heat protection elements of super- and hypersonic vehicles with reproduction of vibrations and other mechanical loads along flight trajectory.