Re-heat ignition system in aircraft engine, Other Engineering

Assignment Help:

Re-heat Ignition

The atomised fuel spray is fed into the re-heat jet pipe and ignited by one of three methods:-
• Spark Ignition
• Hot Streak Ignition
• Catalytic Ignition

a. Spark Ignition. Spark ignition for re-heat fuel is similar to normal engine ignition. Light-up is obtained by using a pilot fuel burner and an igniter plug. The igniter plug is fitted downstream of the pilot burner in a conical fitting that is a part of the re-heat system. The core provides airflow conditions suitable for light-up and when fuel is sprayed from the pilot burner, it is carried on to the igniter plug and ignition takes place. This method has been superseded by the other methods.

b. Hot Streak Ignition. The hot streak ignition system is more often called ‘hot shot' ignition. It consists of one or two fuel injectors; one sprays fuel into the engine combustion system and the other if fitted sprays fuel aft of the turbine as a relay system to keep the flame alight for a longer distance. Spraying additional fuel into the main combustion area causes an elongated flame and a ‘hot streak' flame reaches and ignites the re-heat fuel. The turbine blades are not damaged because the hot streak flame is of short duration. This method provides a very quick light up, however if it fails to light then reheat has to be reselected.

c. Catalytic Ignition. Catalytic ignition is achieved by use of a platinum/rhodium element. Atomised fuel is sprayed over the element and a chemical reaction causes spontaneous ignition.

511_reheat ignation.png

886_reheat ignation1.png


Related Discussions:- Re-heat ignition system in aircraft engine

Polymorphism, Q.  Define the polymorphism. Ans. POLYMORPHISM: It is d...

Q.  Define the polymorphism. Ans. POLYMORPHISM: It is defined as the change in atomic structure which occurs at a definite transformation temperature. The cooling diagram of

Noise reduction in aircraft design, Noise reduction The problem of engi...

Noise reduction The problem of engine noise has always been associated with aircraft. Increases in engine power have given rise to increases in noise and the indications are t

A/c question 1, Briefly describe a simple method of estimating summer outsi...

Briefly describe a simple method of estimating summer outside air conditions for the design calculations of an air conditioning scheme. If a more accurate assessment of heat gains

Operations reseach techniques, how does operations reseach enable in reveal...

how does operations reseach enable in revealing new problems

Ic Packages, Ic Packages: Like transistors and other types of solid sta...

Ic Packages: Like transistors and other types of solid state components, IC's are mounted in packages, which protect them from moisture, dust and other types of contaminations.

Wheatstone bridge, The resistance of the strain gauges is usually measured ...

The resistance of the strain gauges is usually measured with a Wheatstone bridge. All bridges have balancing circuits which can be apex or parallel. Both methods are equivalent.

International financial management , explain the funcyions and structure of...

explain the funcyions and structure of foreign exchange market.

Engineering physics, when same music is played in veena and violin , we sha...

when same music is played in veena and violin , we shall hear the sound of

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd