Sonic airflow - aircraft maintenance, Other Engineering

Sonic airflow though divergent and convergent ducts

When a flow of fluid (i.e. gas) flows at sonic speed through a convergent duct a shock wave forms at the exit area of the duct - The exit area is said to be choked. The shock wave forms a restriction to the fluid and pressure will increase, temperature will increase and velocity will decrease.

735_sonic airflow.png

When a gas flow reaches sonic velocity in a convergent duct the nozzle will choke and the pressure will increase. To prevent a pressure rise that would eventually prevent a 'fluid' flow and completely choke the duct a divergent section is added making the duct convergent/divergent (Con/DI). The pressure of gas released into the divergent section of the nozzle causes the velocity of the 'fluid' to increase, pressure to decrease, and therefore temperature to decrease. Gas pressure acts on the walls of the divergent section, this pressure gives additional thrust that is known as pressure thrust.

1834_sonic airflow1.png

Posted Date: 9/11/2012 7:22:52 AM | Location : United States

Related Discussions:- Sonic airflow - aircraft maintenance, Assignment Help, Ask Question on Sonic airflow - aircraft maintenance, Get Answer, Expert's Help, Sonic airflow - aircraft maintenance Discussions

Write discussion on Sonic airflow - aircraft maintenance
Your posts are moderated
Related Questions
Virtual prototyping techniques provide unique way of interacting with computer data and images. These removes the barriers of key board, monitor and mouse and allow user to experi

Thermal equilibrium The definition and measurement of temperature must be logically preceded by the concept of thermal equilibrium and the Zeroth law. To determine operationally wh

procedure to assemble the spindle in the cnc mzachine.........

APPLICATION TO THE AXIAL FLOW COMPRESSOR: In order for the compressor to deliver a high mass airflow for a minimum effort required to drive it, it is important that all the com

Dear Sir, Please answer the follwing question . Specs: Filteration Capacity 18000 LPH , Tested pressure 6Kg/, Vertical MS pressure Sand filter(flat ends 6mm thick & di

Special Casting Methods             1. Die casting : Die casting is a permanent mould casting techniques in which molten metal is forced in the mould cavity under a pressure

Method of calculating the thrust forces: The thrust forces or gas loads can be calculated for the engine, or for any flow section of the engine, provided that the areas, pressu

Layout and operation of typical thrust reversing system: Clamshell door system The clamshell door system is a pneumatically operated system, as shown in detail in fig Norm

write a program for remote procedure call using java

How do we classify the principal planes as minor and major principal planes?