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Module 15. Gas turbine engine

What type of intake is one that decreases gradually in area and then increases?

  • Convergent.
  • Convergent / Divergent.
  • Divergent.

Explanation

An intake that first decreases in area and then increases is a convergent-divergent (con-di) duct. The convergent section accelerates the air, and the divergent section then decelerates it and recovers pressure; this geometry is used to control airflow on intakes that must handle high or supersonic speeds.

Jordi asking:

isnt this divergent only?Why can it be also convergent?I think convergent is the opposite of what it says.

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