Convective Ignition of Nitrocellulose Based Propellants in Unsteady Flow Fields.
Abstract
This is a report on a continuing research directed at convective ignition of nitrocellulose-based propellants. The research encompasses flame theory, chemistry, and fluid dynamics, The primary objectives of the research are to determine the site and mode of convective ignition of propellant cylinders in crossflow and to determine the influence of ignitier gas composition on the ignition events. Work is well under way to determine the conditions for which ignition occurs at the leading edge in the separation zone or in the wake. The laboratory approach developed (i.e., the use of a shock tunnel as the convective heating device) has been proved successful and over one hundred shock tunnel experiments have been conducted. All diagnostic devices (such as thin film gauges, miniature pressure transducer and radiation detectors) proposed last year were designed, fabricated and used successfully. Attention was focused on the different behavior of single, double and triple based propellants under the same test conditions, and on the importance of the transient boundary layer development time on ignition trends. To validate and substantiate the ignition trends, additional data collection and development of analytical models are needed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1979
- Accession Number
- ADA073546
Entities
People
- A. Birk
- Leonard H. Caveny
- William A. Sirignano
Organizations
- Princeton University