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Why the direction of flame is in upward?
A flame's direction is upwards because heat rises.
What will be the different results by different test method of flame retardant fabric?
It is a complex procedure when testing the flame retardant property of the fabric, because there are many factors to effect the fabric burning. And the factors are related to each other. Even if one same fabric behave different, the test result will be a little difference. In general, the factors are: lighting fire form, time on fire, the position of the fabric and the fire, etc. Different test method have different test result. Until now, horizontal firing, 45℃ firing and the vertical firing are the most commonly used method. When balance the flame retardant property of the fabric, we should specify the test method and the condition and the horizontal firing is the most relaxed method.With the same finished process, test by the 45℃ firing, if the flame can not burn through the fabric immediately in the fabric and the fire will increase and spread to the around. The flame retardant property is bad. When test by vertical firing, if the fabric after burning can form the expansive carbon residue, which can be in favor of the flame spread up and get good flame retardant property.As the the 45℃ firing, we suggest to use the molten drop flame retardant chemicals, which is in favor of burning through in short time. As for vertical firing , we suggest to use the form carbon flame retardant chemicals, which is benefit for the fabric to form the non flame carbon floor in short time and get the flame retardant property.by yulong tex
What causes the luminousity of a flame?
Flame luminosity occurs because of lack of oxygen. Also, the air holes in the Bunsen burner affects the flame.
Fire and flash point values of fuels?
flash point is the temperature of the fuel at which a momentary or may be a instantaneous flame occurs occurs when you introduce a source of flame over the surface of the fuel (not by contact, the introductory flame should always be above the surface of the fuel)fire point is the temperature of the fuel at which at least a 5 second flame occurs when you introduce a source of flame above the surface of the fuel.
When is the flame extinguished?
This occurs only when the flame is robbed of oxygen.
Which priciple explains why the flame bends towards the wind?
The Bernoulli's Principle explains why the flame bends towards the wind. As the wind blows over the flame, it lowers the air pressure above the flame, causing the higher pressure below the flame to push it in the direction of the wind.
What is the name of the blue flame?
The blue flame is commonly known as a "butane flame" or a "clean burning flame." It occurs when a gas like butane is burned cleanly, resulting in a hotter and more efficient flame that appears blue in color.
What is a solor flame?
A solar flame is a phenomenon where excessive solar UV radiation interacts with gases in the Earth's atmosphere, producing a glowing effect that can resemble a flame. It occurs in the upper atmosphere and is not an actual flame like you would see from a fire.
Why the fire is upward direction?
Heat rises so the draught pulls the flame up
How many layers does the hottest flame have?
The hottest part of a flame typically consists of three layers: the innermost blue cone where combustion occurs, the intermediate faint blue region where gases mix and ignite, and the outermost yellow region where incomplete combustion occurs.
How many different types of flame can a Bunsen burner produce?
A Bunsen burner can produce two main types of flames: the luminous flame and the non-luminous flame. The luminous flame, which is yellow and produces soot, occurs when the air supply is restricted, leading to incomplete combustion. The non-luminous flame, which is blue and hotter, occurs when the air supply is increased, allowing for complete combustion. Adjusting the air supply enables the user to switch between these flame types depending on the desired application.
What is orange flame in Bunsen burner also called?
The orange flame in a Bunsen burner is called a "safety flame." It occurs when the air hole is partially closed, resulting in incomplete combustion of the gas. This flame is typically used when needing a less intense heat source.
