Projectile Fired by Burning Propellant: Gas Cycle?

  • Thread starter Joe591
  • Start date
  • Tags
    Projectile
In summary, the conversation discusses the concept of ideal gas cycles in thermodynamics, specifically in relation to the Otto cycle and its application to a projectile being launched by a burning propellant. The topic also branches into the Thermodynamics of Interior Ballistics, which deals with the question at hand but does not have specific information on potato guns. The conversation also touches on the difference between oxygenated and non-oxygenated propellants and their effects on chamber pressure. While the discussion does not conclude with a definitive answer, it provides valuable insights and resources for further research on the topic.
  • #1
Joe591
54
33
TL;DR Summary
Pressure caused by burning propellant.
In thermodynamics you have ideal gas cycles. A example of this is the Otto cycle where there is adiabatic compression followed by constant volume combustion, followed by adiabatic expansion and then finally heat rejection at constant volume. What I'm wondering is whether there is a similar type gas cycle for a projectile being thrown out of a barrel by a burning propellant. Let's say there is a hypothetical potatoes canon with a small fuel reservoir. The fuel in the reservoir is ignited and the potatoes is launched through the barrel. Is there some sort of ''gas cycle'' for something like that? Please cite sources...
 
Engineering news on Phys.org
  • #2
This is the Thermodynamics of Interior Ballistics. I am unable to find anything for a potato gun specifically. Try the graphic on p 16 to start. Plus, I'm not clear on what exactly you need for your definition of a gas cycle? Carnot?

Interior ballistics deals with all the aspects of your question, and a lot more I think.

One important difference is that potato guns, AFAIK, do not use oxygenated propellants, like nitrates in black powder. This creates lower chamber pressures than modern cannons that use black powder. Correct me if I'm wrong.

https://apps.dtic.mil/dtic/tr/fulltext/u2/a590866.pdf
 
Last edited:
  • Like
Likes Lnewqban and Joe591
  • #3
@jim mcnamara let's just say the potato gun is a metaphor for a more generalized type of problem. The problem of throwing something very far, very quickly by burning something else rapidly. Doesn't have to be a gas cycle if the ''industry norm'' isn't gas cycle oriented. Your link is fantastic! Thanks...
 

Related to Projectile Fired by Burning Propellant: Gas Cycle?

1. What is a projectile fired by burning propellant?

A projectile fired by burning propellant is a type of weapon or device that uses a burning propellant, such as gunpowder, to create a high-pressure gas that propels a projectile, such as a bullet or rocket, out of a barrel or launch tube.

2. How does the gas cycle work in a projectile fired by burning propellant?

The gas cycle in a projectile fired by burning propellant refers to the sequence of events that occur when the propellant is ignited. The burning propellant creates high-pressure gas, which forces the projectile out of the barrel or launch tube. The gas then expands and exits the barrel, creating a recoil force that pushes the weapon or device in the opposite direction.

3. What are the advantages of using a gas cycle in a projectile fired by burning propellant?

Using a gas cycle in a projectile fired by burning propellant allows for a more efficient use of energy compared to other propulsion methods. It also allows for greater control over the velocity and trajectory of the projectile, making it more accurate and effective.

4. Are there any disadvantages to using a gas cycle in a projectile fired by burning propellant?

One potential disadvantage of using a gas cycle in a projectile fired by burning propellant is the production of high temperatures and gases that can be harmful to the user. Additionally, the gas cycle may require more maintenance and cleaning compared to other propulsion methods.

5. What are some common applications of projectiles fired by burning propellant with a gas cycle?

Projectiles fired by burning propellant with a gas cycle are commonly used in firearms, rockets, and other weapons systems. They are also used in launching systems for satellites and other spacecraft, as well as in industrial and research applications such as testing materials and structures for impact resistance.

Similar threads

  • Introductory Physics Homework Help
Replies
1
Views
2K
Replies
12
Views
1K
  • Introductory Physics Homework Help
Replies
1
Views
1K
  • Introductory Physics Homework Help
Replies
5
Views
2K
  • Thermodynamics
Replies
1
Views
1K
Replies
8
Views
12K
  • Introductory Physics Homework Help
Replies
4
Views
2K
  • Advanced Physics Homework Help
Replies
1
Views
2K
  • Introductory Physics Homework Help
Replies
5
Views
917
  • Thermodynamics
Replies
3
Views
917
Back
Top