Pressure/force calculation for combustion in a cylinder

[Stormer]

Hi. How do i calculate the dynamic combustion pressure, force and piston velocity for different fuels in a cylinder? Assuming perfect combustion and no thermal loss trough the walls and piston.

I am thinking about an application similar to for example a fuel driven nail gun that runs on a butane gas and air mixture.

The known parameters is:

• The mass the cylinder will move (M)
• A spring constant and the distance the cylinder will move (F = kx)
• The diameter of the cylinder (D)
• The initial volume and pressure of fuel air mixture (in perfect ratio).
• The fuel used (and that will give the combustion energy and therefore temperature and pressure rise in the cylinder)

 

[Lnewqban]

Welcome, Stormer

How much you compress the air-fuel mix prior ignition is very important for the magnitude of the resultant force.

Please, see:
https://en.wikipedia.org/wiki/Compression_ratio

 

[jrmichler]

Get a book on internal combustion engines. I have a copy of Internal Combustion Engines by Obert that has a whole chapter that answers your question, but that book is long out of print. Search Amazon for internal combustion engines, and you will get a list of books that all look like they will answer your question.