APCP Autoignition: Pressure Deflagration Start

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Discussion Overview

The discussion revolves around the pressure at which ammonium perchlorate composite propellant begins to deflagrate spontaneously. Participants explore the challenges in finding specific data and the relationship between pressure, energy, and density in this context.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant inquires about the specific pressure required for the spontaneous deflagration of ammonium perchlorate composite propellant.
  • Another participant suggests reaching out to NASA or JPL for information, indicating a lack of readily available data online.
  • A participant expresses frustration over the difficulty in obtaining information and mentions the local science facility, Fermilab, as being potentially uninterested in the inquiry.
  • One participant reflects on the relationship between pressure, energy, and density, proposing a formula that relates these concepts, indicating a potential path to calculate relevant values.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the specific pressure value, and multiple views on how to obtain the information remain. The discussion is unresolved regarding the exact pressure for deflagration.

Contextual Notes

Participants note the need for additional information to accurately determine the pressure, highlighting the dependence on definitions and the complexity of the relationships involved.

Praestrigiator
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What is the pressure at which ammonium perchlorate composite propellant spontaneously begins deflagration?
 
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If google doesn't help, try asking at NASA or JPL, they should know such things.
 
Borek said:
If google doesn't help, try asking at NASA or JPL, they should know such things.
Yeah, I tried googling it but to no avail. I know NASA and JPL will probably take a while to reply to any email or message. Too bad Fermilab is the only science place near me, I'm sure they'd be irritated by being asked questions irrelevant to their field.
 
actually, searching a little further, pressure is force per area, which is apparently equal to energy per volume. So the fact that I couldn't answer this before is because I didn't give enough information. Also the energy is (Pf-Pi)/Density. with this I should be able to calculate at least something helpful to me.
 

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