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Two main different combustion regime: diffusion flame is generated when fuel and oxidizer are provided separately and then mixes with each other and reacts in the mixing zone; while premixed flame is generated when fuel and oxidizer are totally mixed and goes to burning after ignition. The main difference is that premixed flame forms a propagating wave front and diffusion flame tends to be stable. Due to that, premixed flame is more sensitive to acoustics, i.e. flashback and blow-off. On the other hand, the mixing is a key factor for diffusion flame. If mixing is not enough, we suffers with high soot and unburnt hydrocarbon emissions. The flame thickness is different a lot, and premixed flame is much thinner. In terms of environment issue, NOx emission is relatively higher in premixed flame than in diffusion flame due to higher flame temperature. In application, safety is a main concern for premixed flame, so that stabilization is always applied in practice. Diffusion flame is more widely applied, especially on aircraft and power station.
What else can I help you with?
How many Zones of burner flame?
THREE!
Explain oxy- acetylene welding process?
Oxygen and acetylene tanks feed into your torch. When opened, the gases will mix in a chamber in the torch, then flow out of the torch tip. Using a spark lighter, they will ignite causing a flame. This flame can be adjusted to a neutral flame by moving the knobs on the tank regulators.
Why should acetylene tanks never be used while laying on there sides?
They are not hollow- they are filled with a spongy material that is saturated with liquid acetone. When the acetylene is pumped into the tank, it dissolves in the acetone, much like CO2 dissolving in a bottle of soda. If the tanks are laid on their sides, the acetone will be forced out into the hoses and torch. You will get a strange flame with a lot of excess carbon. Tanks that have been laid down should be stood up, and left in that position for at least an hour so that the acetone moves back towards the bottom of the spongy material.
What is the sequence of operations of gas furnaces?
Thermostat calls for heat. Induced draft fan motor starts. Vent pressure switch verifies pressure. Simultaneously gas valve opens and ignitor lights burner(ignition varies: hot surface ignitor, electronic spark ignitor, or standing pilot). Flame is sensed. High limit temperature switch is made. Blower fan runs. Thermostat calls for no heat. Gas valves close. Burners shut off. Induced draft fan shuts off. Blower fan put into fan delay(fan blower continues to run). Low limit temperature switch made. Fan blower stops.
The two types of welds are?
TIG uses tungsten in a gun and electricity to melt the material, the user must manually add filler rod. Needs shielding gas Mig uses a gun, but the filler rod flows out of the gun. Electricity flows from tip of wire into material. needs shielding gas except with flux-cored wire. SMAW uses pre fluxed electrodes. electricity flows trough electrode holder, into material when material is scraped by electrode. No shielding gas. Oxy-fuel. Flame welding. Oxygen and a fuel (acetylene, propane, mapp, etc.) are mixed in a torch, ignited, and used to melt material. filler wire is manually added. There are more indepth explanations, and advanced machines, but that is the basics.
Is there a real difference between flame-retardant and inflammable bedding?
There is a real difference. A flame-retardant bedding has filler that is not flame resistant, but the outer later is flame resistant. As for inflammable bedding, both the filler and the outer layer are both flame resistant.
What is the flame call when the air hole is not fully open?
You think probable to a diffusion flame.
What is the difference between a blue flame and a yellow flame?
the blue flame is hoter than the yellow flame.http://en.wikipedia.org/wiki/Flame hope this gives u the right picture
What is the difference between a goldfish and the flame of a burning candle?
the goldfish is a living thing
What is the difference between fire retardant and flame retardant coveralls?
Flame retardant means the material will burn at a slow rate. However, flame resistant is defined as resisting flames and the power to withstand any type of flame.
What is the difference between the top and bottom of a Bunsen burner flame?
one side shoots out flames
What has the author Nedunchezhian Swaminathan written?
Nedunchezhian Swaminathan has written: 'Turbulent premixed flames' -- subject(s): Turbulence, Combustion engineering, Flame, TECHNOLOGY & ENGINEERING / Mechanical
What is the differences between the Olympic flame to the Olympic torch?
There is no difference at allthey are both represented for the same reason:) :):) :) :) :)
What is the major difference between the colours of flames produced by alkali metal with that of calcium when performing flame tests?
The major difference is the color of the flame produced. Alkali metals typically produce a lilac or purple flame, while calcium produces an orange-red flame. This difference is due to the unique electronic configurations and energy levels of the atoms in each element.
What is the difference between flame and heat?
"Flame" is the visible energy when burning something. "Heat" is given off a flame and countless other things. Flame produces heat, but heat does not always generate from flame, and heat almost never produces flame (friction might count). And if you want the definitions: HEAT: a form of energy that is transferred by a difference in temperature. FLAME: the process of combustion of materials producing heat and light and (often) smoke. If you want to think of it a different way: Flame is what you see when you look at a fire and heat if what you feel from the fire.
What is the difference between flame spread index and flame spread rating?
CheckFlame Spread Index. The definition from NFPA 220 is ...www.nfpa.org/assets/files/PDF/ROP/59A-A2005-ROC.pdf
Why is it somewhat difficult to tell the difference between calcium and lithium and strontium using a flame test?
They both produce a red flame in different shades of red, which is often hard to distingiush which shade.
