As everyone now the effect of primary air presssure on the shape of flame can you tell me what is the effect of central air pressure on the shape of the flame?

Saprina

By increasing the air pressure burner tip velocity will be increased and consequently flame momentum will be increased.Higher flame momentum will facilitate intimate mixing of fuel and air which lead to  short,hot and strong flame.

Dear

Adding to your reply, i would slightly differ with your statement. Generally when u increase pressure velocity gets decrease. With this perspective we cant expect increase in velocity.

For kiln burner if you increase the axial air or radial air pressure(Multi channel burner).Burner tip axial air and radial air velocity will be increased.You may verify it by meaesuring the air velocity of your kiln burner at different static pressure.

HEY RAJ

THUM-UP............................

WELL THIS IS YOU ARE TALKING ABOUT SOMETHING WHICH COMES AFTER DOING PRACTICALITY OF THE THINGS. BUT THERE IS GENERAL VIEW THAT IF YOU INCREASE PRESSURE THE VELOCITY WILL DECREASE . CAN U B MORE SPECIFIC TO YOUR STATEMENT

CHEERS

RAHUL

Dear Rahul,

Could you please send me your e-mail ID ? I will send you a graph which is drawn between nozzle prssure and tip velocity.

Regards,

 R.M.Sahu,

rajmohan.sahu@adityabirla.com

Hi friends

I hope that both of you are correct. But only the conditions are different.

For the same flow, as in the case of venturimeter, when the cross sectional area is reduced, the velocity( or dynamic pressure) will increase and the static prssure exerted on the side walls  will be reduced

For the same cross sectional area like ther tip area in the burner nozzle, when the static pressure is increased by means of increasing the primary air fan speed, both the velocity(or dynamic pressure) as well as the flow will be increased.

Regards

Vinayak

Hey mr. Sahu; Can you send to me a copy of that graph which is drawn between nozzle pressure and tip velocity!

Saprina

Email: saprina.girl@hotmail.com

 

Dear Rahul, Raj Sahu is correct, in equal conditions, when pressure is increasing, the velosity is increasing too. You must careful read about the theme in Aerodynamic or Hydrodynamic courses.

With best regards David Babayan

Back to the basics: the Bernoulli' principle is known since nearly 3 centuries. Read on wiki about it: http://en.wikipedia.org/wiki/Bernoilli_equation . The whole discussion can be reduced to reading this famous equation:

Clearly, if the "input pressure" po increases, the "output velocity" v will increase. However, when the section of a pipe enlarges, the velocity v will decrease and the static pressure p will increase.

Even without the equation, it is clear that -for example- compressed air will flow faster if its pressure is higher.

Dear Mr Sahu

Greeting.............................

Thnx for your concious coverage, but i will kind to have graph which is drawn between nozzle prssure and tip velocity.

Mail ID  rahul_chaubey39@yahoo.co.in    or       chaubey.07@gmail.com

Thnx again in anticpation........