A method of modelling of nozzle and rotor blade rows of gas turbine dedicated to simulations of gas turbine
performance is proposed. The method is applicable especially in early design stage when many of geometric parameters
are yet subject to change. The method is based on analytical formulas derived from considerations of flow theory and
from cascade experiments. It involves determination of parameters of gas flow on the mean radius of blade rows. The
blade row gas exit angle, determined in turbine design point is a basis for determination of details of blade contour
behind the throat position. Throat area is then fixed based on required maximum mass flow in critical conditions. Blade
leading edge radius is determined based on flow inlet angle to the blade row in the design point. The accuracy of
analytical formulas applied for definition of blade contour details for assumed gas exit angle was verified by comparing
the results of analytical formulas with CFD simulations for an airfoil cascade. Losses of enthalpy due to non-isentropic
gas flow are evaluated using the analytical model of Craig and Cox, based on cascade experiments. Effects of blade
cooling flows on losses of total pressure of the gas are determined based on analytical formulas applicable to film
cooling with cooling streams blowing from discrete point along blade surface, including leading and trailing edges. The
losses of total pressure due to film cooling of blades are incorporated into the Craig and Cox model as additional factor
modifying gas flow velocities.
Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies
Informacja
SZANOWNI CZYTELNICY!
UPRZEJMIE INFORMUJEMY, ŻE BIBLIOTEKA FUNKCJONUJE W NASTĘPUJĄCYCH GODZINACH:
Wypożyczalnia i Czytelnia Główna: poniedziałek – piątek od 9.00 do 19.00