To understand the energy transfer process in a turbine rotor blade, it's important to identify the role these blades play within a turbine system. In aerospace engineering, a turbine rotor blade is a critical component of gas turbine engines.
The primary function of a turbine rotor blade is to extract energy from high-pressure, high-temperature gases produced from combustion. This energy is then transformed into rotational motion, which is used to turn the rotor shaft.
Thus, the process primarily involves transferring energy from gases to the turbine rotor. Therefore, the correct answer is:
from gases to the turbine rotor