# Compressor section of gas turbine engine duct shaoes

• cw1690
In summary, the compressor section in a gas turbine engine is responsible for compressing air and increasing its pressure before it enters the combustion chamber. The shape of the compressor section, specifically the duct shapes, can greatly impact the engine's performance. There are three main types of compressor section duct shapes: annular, axial, and centrifugal. Engineers use computational fluid dynamics and wind tunnel testing to determine the optimal shape for these ducts. Additionally, the shape of the compressor section ducts can be modified to adapt to different operating conditions, ensuring maximum efficiency and performance in various flight phases.
cw1690
why convergent rather than divergent? is this to maintain the constant air velocity.
Can someone explain this better to me. Would be helpfull

I wonder why no one replied on this.

This is to take care of density increase in the flow while keeping constant axial velocity. In turbine density decreases do to expansion so passage is divergent.

Thanks for the late reply to this, I have managed to understand this now. Thanks for your help anyways

## 1. What is the function of the compressor section in a gas turbine engine?

The compressor section is responsible for compressing air and increasing its pressure before it enters the combustion chamber. This compressed air is essential for the efficient operation of the engine as it allows for more fuel to be burned and produces more thrust.

## 2. How does the shape of the compressor section impact the performance of a gas turbine engine?

The shape of the compressor section, specifically the duct shapes, can affect the efficiency and airflow of the engine. A well-designed duct shape can minimize air leakage and turbulence, leading to better compression and overall engine performance.

## 3. What are the different types of compressor section duct shapes used in gas turbine engines?

There are mainly three types of compressor section duct shapes: annular, axial, and centrifugal. Annular ducts are circular and surround the engine's central axis, while axial ducts have a straight, cylindrical shape. Centrifugal ducts have a curved shape and are commonly used in smaller gas turbine engines.

## 4. How do engineers determine the optimal shape for the compressor section ducts?

Engineers use computational fluid dynamics (CFD) simulations and wind tunnel testing to analyze and optimize the shape of compressor section ducts. They consider factors such as airflow, pressure distribution, and efficiency to determine the most efficient and effective duct shape for a specific gas turbine engine.

## 5. Can the shape of the compressor section ducts be modified for different operating conditions?

Yes, the shape of the compressor section ducts can be modified to adapt to different operating conditions. For example, during takeoff and climb, when the engine requires more airflow, the duct shape can be altered to accommodate this. This allows for maximum efficiency and performance in various flight phases.

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