What is described as a dynamically balanced unit consisting of blades attached to a rotating disk?

The term described as a dynamically balanced unit consisting of blades attached to a rotating disk is known as a turbine wheel. This component is crucial in gas turbine engines, where the turbine wheel converts thermal energy from high-temperature, high-pressure gases into mechanical energy. The blades are shaped to efficiently extract energy from the gas flow, allowing the turbine to drive the compressor and other engine components.

The turbine wheel's design ensures that it operates smoothly at high speeds without causing excessive vibration or wear, which might occur if it were not properly balanced. Additionally, the connection to the rotating disk allows for a seamless transfer of force and energy, making it an integral part of the gas turbine assembly.

Other components mentioned, such as the rotor, impeller, and compressor disk, also play vital roles within turbine systems but do not specifically refer to the dynamically balanced unit of blades attached to a rotating disk in the same way that the turbine wheel does. The rotor is a broader term that can refer to several rotating parts, including the entire assembly, while an impeller is usually associated with fluid movement rather than power generation in a turbine context. The compressor disk, while connected to similar processes, is specifically geared towards compressing air rather than extracting energy from gas flow.