THE cooling of high pressure turbine by air-steam
mixture at take-off
K.S. Yepifanov, A. Safi
In modern gas
turbine engines the working fluid temperature exceeds the operating temperature of the blade materials. Therefore, to ensure blade
performance is used air-cooling
system. Water injection is a one way
of increasing cooling efficiency. This reduces coolant temperature coolant and
increase the heat transfer rate in cooling channels.
An example of the high pressure turbine working blades internal convective
cooling showed that the use of water injection on takeoff will reduce the
cooling air selection by 60% while while
blade resource maintaining that provide a reduction
in fuel consumption by
0.7%.
Key words: high pressure
turbine, cooling system.