What component houses Inlet Guide Vanes (IGVs) in the front frame?

What component houses Inlet Guide Vanes (IGVs) in the front frame?

• A. Welded steel ring
• B. Aluminum frame
• C. Plastic casing
• D. Ceramic shroud

Answer: (A)

Inlet Guide Vanes are held in a rigid, heat-resistant enclosure built into the front frame, specifically a welded steel ring. This ring provides the structural support and precise alignment needed for the IGV blades to pivot and direct air into the compressor, while tolerating the high-temperature, high-load environment of the engine front. Aluminum would lack the necessary strength and heat resistance, plastic would degrade under heat and exposure to fluids, and a ceramic shroud isn’t used as a housing for IGVs due to brittleness and the need for a durable, mountable enclosure.

Inlet Guide Vanes are held in a rigid, heat-resistant enclosure built into the front frame, specifically a welded steel ring. This ring provides the structural support and precise alignment needed for the IGV blades to pivot and direct air into the compressor, while tolerating the high-temperature, high-load environment of the engine front. Aluminum would lack the necessary strength and heat resistance, plastic would degrade under heat and exposure to fluids, and a ceramic shroud isn’t used as a housing for IGVs due to brittleness and the need for a durable, mountable enclosure.