Simulation of Closed Chamber Burning of Very-High Rate Propellant
Abstract
Closed chamber firings of very-high burning rate (VHBR) propellants have been conducted at the Ballistic Research Laboratory as part of the traveling charge gun program. Using standard closed chamber data reduction techniques, burning rates in the range of 10 to 300 m/s over a pressure range of 50 to 300 MPa have been measured. Pressure-time records from the firings of VHBR propellants exhibit severe pressure wave phenomena which are removed by digital filtering prior to transformation to burning rate data. Burning rate data for four VHBR propellants were used in a 1-D traveling charge code set up to simulate VHBR propellant being fired in a closed chamber. Objectives were to check consistency of the data, obtain better estimates of the data, obtain an understanding of the gas dynamic phenomena occurring in the chamber, and assess the validity of simulations produced by the 1-D traveling charge gun code. The procedure used was to match simulated data to experimental pressure-time data and adjust the burning rate data until the two curves matched. It is concluded that consistency of burning rate data in excess of 35 m/s over the pressure range of 50-150 MPa is poor. High amplitude pressure waves in the chamber create severe errors in the derived propellant burning rates.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1988
- Accession Number
- ADA194689
Entities
People
- Paul G. Baer
Organizations
- Ballistic Research Laboratory