Active clearance control system, Other Engineering

Active clearance control system

The system provides fan discharge air for cooling the core compartment and the low-pressure turbine case. At low altitudes the core engine requires more cooling and the LPT case requires less cooling to prevent rub. At high altitude the core requires less and in the LPT core requires more to close clearances.

By means of a Y manifold and two shut-off valves, cooling air can be selectively directed to the core compartment or to the LPT case. The valves are not positively shut, but permit a required minimum flow at all altitudes and when activated added flow is directed. The valves are controlled by an altitude sensor which activates the core compartment valve below 19,000 feet +5000 feet and the LPT case valve above 19,000 feet +5000 feet.

Increased cooling airflow causes the cases to cool and shrink. This shrinkage closes blade tip to case clearances producing improved efficiency.

 

1625_active clearance control system.png

Posted Date: 9/12/2012 3:53:41 AM | Location : United States







Related Discussions:- Active clearance control system, Assignment Help, Ask Question on Active clearance control system, Get Answer, Expert's Help, Active clearance control system Discussions

Write discussion on Active clearance control system
Your posts are moderated
Related Questions
how to generate random numbers in rectangular region?

Allowances for pattern : A pattern is always made larger than the required size of the casting in order to allow for various factor, such as shrinkage, machining, distortion and r

Gas turbine fuel properties and specification In the earliest days of the gas turbine engine, kerosene was regarded as the most suitable fuel. It commended itself on the grounds

Question 1 (100 marks) As Surveyor in charge of an underground mine you have been instructed to design a tunnel to join a crosscut to a haulage drive. The details of the crosscut a

Which type of financing is appropriate to each firm?

How to draw diagrams for Rankine cycle

Q. Explain the following with reference to deformation of metals:                         (1) Preferred orientation                         (2) Elastic after effect

Explain Air temperature indicator

How to I make my archimedes screw work?

Navigation Systems  • Traditional guidance systems used mechanical gyroscopes (rate gyros) to measure the angular velocities of the vehicle or of the gimbals on which the seeke