Input data list of applied software DIESEL-2/4t

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GAS TURBINES   (RADIAL AND AXIAL)

   The calculation of gas turbines parameters of high and low pressure stages can be carried out in several ways:
1)  in structure of the combined engine:
     - pressure ratio and adiabatic efficiency of the turbine are known;
     - the characteristics of the turbine are imported from text file;
     - gas-dynamic calculation of the turbine;
2)  the independent calculation:
     - gas-dynamic calculation of the turbine at a given regime;
     - gas-dynamic calculation of the turbine characteristics and export of results into text file.

Data are necessary for calculation of an engine without the coordination of turbines characteristics

Parameters of design conditions for the characteristics calculation

Configuration for gas-dynamic calculation

Diagram of radial turbine

Radial turbine (22194 bytes)

Nozzle assembly

r0  is radius of front edge of vanes.
a0
  is designed angle of inlet.
a1
is designed angle of outlet.
D1
is average diameter of the outlet from vanes.
b1 
is length of vanes.
z1  
is number of vanes.
y   is velocity coefficient.

Rotor

r1 is radius of front edge of blades.
b2
  is length of blades.
D2 
is average diameter of the outlet from blades
d1 
is maximum thickness of blades.
b1 
is designed angle of inlet.
b2  
is designed angle of outlet.
z2  is number of blades.
d   
is backlash between the blades and the case.
j
    is velocity coefficient.

Diagram of axial turbine

Axial turbine (9848 bytes)  

Nozzle assembly

r0  is radius of front edge of vanes.
a0
is designed angle of inlet.
a1
is designed angle of outlet.
D1
is average diameter of the outlet from vanes.
b1 
is length of vanes.
z1 
is number of vanes.
y is velocity coefficient.

Rotor

r1 is radius of front edge of blades.
b2
is length of blades.
D2
is average diameter of the outlet from blades
d1 
is maximum thickness of blades.
b1 
is designed angle of inlet.
b2 
is designed angle of outlet.
z2  is number of blades.
d  
is backlash between the blades and the case.
j
  is velocity coefficient.

 

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