Ignition of NOS 365 Liquid Propellant Containing an Air Bubble under Simulated Breech Pressurization Conditions
Abstract
A setback simulator has been used to generate pressure within a liquid propellant (NOS 365) containing a suspended air bubble. The bubble volume was varied from 1 to 200 microliters. Several tests were made using a 1000 microliter air space above the liquid propellant. The maximum test pressure was around 600 MPa and the pressurization rates ranged fom 25 MPa/msec to 800 MPa/ msec. The following conclusions were reached: 1. A suspended air bubble makes liquid propellant more sensitive to pressure ignition. 2. The intensity of the reaction appears to increase with bubble size. 3. Higher pressurization rates caused ignition of neat liquid propellant. However, this may be due to extrusion of propellant around the pistons. 4. The impact mode of activator operation, although permitting higher pressures and pressurization rates than the contact mode, also gives more variability in the results.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1980
- Accession Number
- ADA085723
Entities
People
- Edwin A. O'leary
- Vincent M. Boyle
Organizations
- Ballistic Research Laboratory