What is the quenching distance?
The quenching distance, , represents the smallest distance between two parallel surfaces which allows the propagation in the space between them of a laminar flame which is developing in a homogeneous and quiescent explosive gas mixture , .
What is the difference between knocking and detonation?
Knocking vs Detonation Knocking is the making sharp sounds due to uneven combustion of fuel in the cylinder of a vehicle engine. Detonation is the process of pre-ignition or auto-ignition of a fuel in an engine’s combustion chamber.
What is chemical quenching?
Chemical quenching means that a reactant is introduced to favor an endothermic reaction with an associated reduction of temperature. Also, the lowered temperature of the introduced reactant strengthens the effect.
Does quenching increase strength?
Quench Hardening Steel Depending on the carbon content and alloying elements of the steel, it can get left with a harder, more brittle microstructure, such as martensite or bainite, when it undergoes the quench hardening process. These microstructures result in increased strength and hardness for the steel.
What is difference between octane and cetane number?
The main difference between cetane and octane ratings is that the octane rating represents how well a fuel can resist pre-ignition due to compression—ensuring the fuel ignites only from a spark from the spark plug. However, the cetane number measures the delay in the ignition time of the fuel.
How knocking can be reduced?
Increasing the cooling water temperature. Retarding the spark advance. Increasing the inlet air temperature.
How can you tell the difference between static and dynamic quenching?
Occurs in ground state. If the temperature increase (chemical stability will change), the rate of static quenching will decrease. If the temperature increase, the dynamic quenching rate will increase.
Why is tempering always required after quenching?
After being quenched, the metal is in a very hard state, but it’s brittle. The steel is tempered to reduce some of the hardness and increase ductility. It’s heated for a set period of time at a temperature that falls between 400° F and 1,105° F.
How long can you run an ethanol fireplace?
You should always prioritize safety whenever you are installing ethanol fireplaces or any other fireplace for that matter. Ethanol fireplaces can run as long as 4 to 5 hours, sometimes even more. They shut down as soon as they run out of fuel.
How do you use bio-ethanol in a gas fireplace?
Fill the burner with approved bio-ethanol fuel until it is no more than 2/3 full. Use a long lighter to light the fuel. Make sure to keep an arm’s length away when lighting. Make sure to keep the fuel a safe distance away from the fireplace, approximately 1 meter or 40 inches away. Fuel will burn low at first.
How much clearance do you need for a recessed ethanol fireplace?
The above diagram shows the most common clearance requirements for recessed ethanol fireplaces. Your fireplace needs to be at least: 39″ (~3 feet) away from the nearest flammable material, such as curtains and furniture, 20″ (~2.5 feet) off the floor.
How many kilowatts does an ethanol fireplace burner use?
A 1.5-liter burner is usually present in most ethanol heaters. These burners mostly have thermal outputs between the range of 2.0 and 2.5 kilowatts. You will find significant differences between ethanol fireplaces, bio ethanol fireplace and wood or gas burning stoves. Bio ethanol fuel powers ethanol fireplaces to produce heat and flames.