Liquid Fuel Usability

To be able to be used practically, a kind of liquid fuel must meet the requirement in usability. Obviously, the so-called usability is closely related to the use and the environment of use, and there is no general usability requirement.
1. Low temperature performance and fluidity
The freezing point of fuel is a very important indicator. It directly affects the production rate of aviation kerosene per ton of crude oil.
2. Thermal stability of fuel
Thermal stability is divided into static thermal stability and dynamic thermal stability. The thermal oxidation stability of the fuel under static conditions in a metal container is static thermal stability, and the less sediment produced after the oil sample is heated, the better its thermal stability. Dynamic thermal stability refers to the thermal stability of jet fuel under flowing conditions. It simulates the heating conditions of fuel on the surface of the engine lubricating oil heat exchanger (or in the afterburner fuel main pipe), and investigates the color of the sediment on the pipe wall and rated by the pressure drop across a filter element.
3. Corrosion to metal
The cause of metal corrosion is sulfur and sulfides in the fuel. Since copper and silver are more sensitive to the corrosion of active substances, copper test and silver test are stipulated in the specifications.
4. Compatibility with rubber
The erosive effect of jet fuel on rubber and paint will cause damage to the fuel system.
5. Fuel cleanliness
There are many precision parts in the fuel system, which are very sensitive to impurities in aviation kerosene. Therefore, the fuel has strict requirements on cleanliness during storage, transportation and use. It must be colorless and white, free from mechanical impurity precipitation, free water, and suspended solids. In addition, fuel oil will be polluted by bacteria and microorganisms during storage, and the microorganisms are concentrated at the oil-water interface at the bottom of the tank. Therefore, regular and timely removal of accumulated water and deposits in the oil tank is an important measure to control fuel contamination by microorganisms.