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

**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 *

- Adiabatic efficiency of the turbine.
- Pressure ratio of the turbine.

*Parameters of design conditions for the characteristics calculation *

- Rotor r.p.m.
- Temperature of gas at the inlet.
- Pressure of gas at the inlet.
- Pressure of gas at the outlet.
- The gas flow rate through the turbine.

*Configuration for gas-dynamic calculation*

- Type of the turbine: axial or radial.

*Diagram of radial turbine*

. is
designed angle of inlet. a0is designed
angle of outleta1 . is average diameter of the outlet from
vanesD1 . is length of vanes. b1 is number of vanes.z1 y is velocity coefficient.
is length of bladesb2 .is average diameter of the outlet
from blades D2 is maximum thickness of bladesd1 .is designed angle of inletb1 .is designed angle of outlet. b2 is number of bladesz2 .is backlash between the
blades and the cased . is velocity coefficient. j |

is the total area of cross section of the scroll duct at the inlet of the radial turbine (at the end of cut-off sheet).**Hd***.*- Radius of the scroll duct inlet centre
*.* is angle of flow inlet into the scroll duct (0-tangential inlet).**ad**

*Diagram of axial turbine*

.is designed
angle of inlet. a0 is designed
angle of outleta1. is average diameter of the outlet from
vanesD1. is length of vanes. b1 is number of vanes.z1 y is velocity coefficient.
is length of bladesb2 . is average diameter of the outlet from
blades D2 is maximum thickness of bladesd1 . is designed angle of inletb1 .is designed angle of outlet. b2 is number of bladesz2 .is backlash between the blades
and the cased . is velocity coefficient. j |

- Mechanical efficiency.
- Rotor r.p.m. at the design conditions.
- Design power.
- Resistance factor of the turbine tail pipe.