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مکانیک::
گذرصوتی
The two-stage config- uration is longer and heavier but has a higher efficiency, and operates in a high subsonic to a low transonic flow regime.
One-stage designs in the transonic mode often experience dis- tinct trailing edge shocks on the blades (Ahmad and Mirzamoghadam, 1999).
Hummel (2001) investigated the influence of a single-stage highly loaded transonic high-pressure turbine on the following low-pressure turbine vane analytically and exper- imentally.
An increase in the axial gap between successive rows helps to reduce transonic force excitation.
Toshiba Corporation and Tohoku Electric Power have selected steam as a coolant for the vanes and air for the blades for application in the 1500C class 248 MW gas turbine provided with 17 stages to obtain 18:1 pressurization, with the first two stages having transonic blades.
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