How are blades forced outward in a rotary vein compressor?

In a rotary vein compressor, blades are forced outward primarily due to centrifugal force. As the rotor spins, the moving blades experience an outward force because they are rotating around a central axis. This phenomenon occurs because of the inertia of the blades; as they are propelled outward in a circular path, the centrifugal force acts to push them away from the center of rotation.

Centrifugal force is a crucial aspect when considering the functioning of various rotating systems, as it dictates how components like blades behave under high-speed conditions. In the case of rotary vein compressors, this outward motion effectively enables the compression process by allowing space for the working fluid to enter the compressor and be compressed as the blades move outward.

Other options, like hydraulic pressure or gravitational force, don't play a significant role in the operation of rotary vein compressors. Similarly, thermal expansion pertains to changes in material dimensions due to temperature variations, which is not a primary mechanism driving the movement of the blades in this type of compressor.