What is the stoichiometric ratio of Jet A fuel ?

Question

what is the stoichiometric ratio (or stoichiometric air requirement) of Jet A fuel ?

Thanks,

-Steffy

Answer 1

By weight it's 14.7:1. Same as diesel and gasoline.  

In an engine, the ratio continuously changes.  From starting, idle accelerating, climb, cruise, decelerating, etc.  Newer planes use computers to manage the a/f ratio far better than the older planes  for the best power and economy.

Answer 2

JET A-1

Flash point: 38 °C (100 °F)

Autoignition temperature: 210 °C (410 °F)

Freezing point: −47 °C (−40 °C for JET A)

Open air burning temperatures: 260–315 °C (500–599 °F)

Maximum burning temperature: 980 °C (1796 °F)

Density at 15 °C (60 °F): 0.775–0.840 kg/L

Aeroplane fuel is clear to straw colored. The most common fuel is an unleaded/paraffin oil-based fuel classified as Aeroplane A-1, which is produced to an internationally standardized set of specifications. See the section for Jet A below.

The only other Aeroplane fuel that is commonly used in civilian aviation is called Jet B, a fuel in the naptha-kerosene region that is used for its enhanced cold-weather performance. However, Jet B's lighter composition makes it more dangerous to handle, and it is thus restricted only to areas where its cold-weather characteristics are absolutely necessary.

Aeroplane fuel is a mixture of a large number of different hydrocarbons, possibly as many as a thousand or more. The range of their sizes (molecular weights or carbon numbers) is restricted by the requirements for the product, for example, freezing point or smoke point. Kerosene-type Aeroplane fuel (including Jet A and Jet A-1) has a carbon number distribution between about 8 and 16 carbon numbers; wide-cut or naphtha-type Aeroplane fuel (including Jet B), between about 5 and 15 carbon numbers. [1]

Both Aeroplanes (Jet A and Jet B) may contain a number of additives:

    * Antioxidants to prevent gumming, usually based on alkylated phenols, eg. AO-30, AO-31, or AO-37;

    * Antistatic agents, to dissipate static electricity and prevent sparking; Stadis 450, with dinonylnaphthylsulfonic acid (DINNSA) as the active ingredient, is an example

    * Corrosion inhibitors, e.g. DCI-4A used for civilian and military fuels, and DCI-6A used for military fuels;

    * Fuel System Icing Inhibitor (FSII) agents, e.g. Di-EGME; FSII is often mixed at the point-of-sale so that users with heated fuel lines do not have to pay the extra expense;

Militaries around the world use a different classification system of JP numbers. Some are almost identical to their civilian counterparts and differ only by the amounts of a few additives; Jet A-1 is similar to JP-8, Jet B is similar to JP-4. Other military fuels are highly specialized products and are developed for very specific applications. JP-5 fuel is fairly common, and was introduced to reduce the risk of fire on aircraft carriers (has a higher flash point - a minimum of 60 °C). Other fuels were specific to one type of aircraft. JP-6 was developed specifically for the XB-70 Valkyrie and JP-7 for the SR-71 Blackbird. Both these fuels were engineered to have a high flash point to better cope with the heat and stresses of high speed supersonic flight. One aircraft-specific jet fuel still in use by the United States Air Force is JPTS, which was developed in 1956 for the Lockheed U-2 spy plane.

Jet fuels are sometimes classified as kerosene or naphtha-type. Kerosene-type fuels include Jet A, Jet A1, JP-5 and JP-8. Naphtha-type jets fuels, sometimes referred to as "wide-cut" jet fuel, include Jet B and JP-4.

Answer 3

14:1 it's constant for all jet fuels accordng to a quick web search.  try google.