Based on the history of the internationally famous turboshaft engines

the development trends of turboshaft engine industry were summarized

showing distinctive features of serialization

dual-use and international cooperation. Basides

the national-level development programs have played a leading role in the progress of turboshaft engines. Based on the statistical analysis method

the future trends of turboshaft engine structural layout and performance were predicted. In terms of structural layout

turboshaft engines would be developed towards the direction of compact layout

and the stage numbers of compressor and turbine show a decreasing trend. More specifically

single-stage/two-stage centrifugal compressors and single-stage turbines would be more extensively used in turboshaft engines with power output less than 1 500 kW

while axial-centrifugal compressors and two-stage turbines would be more commonly used in engines with power output greater than 1 500 kW. In addition

forward facing output with concentric shaft would become the main power output layout. In terms of engine performance

for the advanced turboshaft engines in the future

the pressure ratio and turbine inlet temperature would be up to 30 and 1 900 K

respectively

the specific fuel consumption would be as low as 0.20 kg/(kW·h)

the specific power and power to mass ratio would reach 400 kW/(kg/s) and 14 kW/kg

respectively.