A turbine engine compressor with vanes on both sides of the impeller is known as what type?

A turbine engine compressor with vanes on both sides of the impeller is known as what type?

• A. Single entry centrifugal
• B. Axial flow compressor
• C. Radial inflow
• D. Double entry centrifugal compressor

Answer: (D)

When a compressor’s impeller is fed from both faces, it’s handling air from two entry paths rather than just one. That arrangement is what defines a double-entry centrifugal compressor. The vanes on both sides of the impeller act as inlet passages for air entering from each side, which increases the flow capacity without changing the rotor size or count. In contrast, a single-entry centrifugal compressor draws air from only one side of the impeller, so it wouldn’t have vanes on both faces feeding the rotor. An axial-flow compressor, meanwhile, moves air along the axis with rotor blades arranged for axial flow, not centrifugal entry. A radial inflow description doesn’t match the standard naming for this configuration. So the feature of vanes feeding air from both sides points to the double-entry centrifugal compressor.

When a compressor’s impeller is fed from both faces, it’s handling air from two entry paths rather than just one. That arrangement is what defines a double-entry centrifugal compressor. The vanes on both sides of the impeller act as inlet passages for air entering from each side, which increases the flow capacity without changing the rotor size or count.

In contrast, a single-entry centrifugal compressor draws air from only one side of the impeller, so it wouldn’t have vanes on both faces feeding the rotor. An axial-flow compressor, meanwhile, moves air along the axis with rotor blades arranged for axial flow, not centrifugal entry. A radial inflow description doesn’t match the standard naming for this configuration.

So the feature of vanes feeding air from both sides points to the double-entry centrifugal compressor.