Influence of processing procedures and propellant ingredients on RDX-based pseudopropellant dark zone

J. Eric Boyer, K. K. Kuo

    Research output: Contribution to conferencePaper

    Abstract

    Understanding the formation and influencing factors on the dark zone above RDXbased propellants is essential in the formulation of accurate models for combustion simulation. In this work, the combustion behavior and flame zone structure of various RDXbased pseudopropellants were compared to neat RDX and actual XM39 propellant. It was found that the existence of a dark zone over the pseudopropellant samples was dependent on the processing procedure used. No shock-precipitated pressed samples showed a dark zone at any test condition. However, an extrusion process utilizing ethyl acetate solvent produced pseudo-XM39 that duplicated the combustion behavior and flame structure of actual XM39 at the reference test conditions of 150 psig (1.13 MPa) and 300 psig (2.17 MPa) in N2 atmosphere. RDX/CAB (80/20) pseudopropellant also showed a dark zone of approximately 4 mm at 300 psig. As shown by other researchers, the addition of binders to RDX is a necessary condition in the formation of a dark zone over the burning surface. However, it is shown here not to be a sufficient condition, as pressed pseudopropellants showed flame attachment without dark zones. It is believed that the microstructure of propellant is an important factor in dark zone formation. With the CAB binder matrix wetting and surrounding RDX particles in extruded samples, dark zones were observed.

    Original languageEnglish (US)
    StatePublished - Jan 1 1997
    Event33rd Joint Propulsion Conference and Exhibit, 1997 - Seattle, United States
    Duration: Jul 6 1997Jul 9 1997

    Other

    Other33rd Joint Propulsion Conference and Exhibit, 1997
    CountryUnited States
    CitySeattle
    Period7/6/977/9/97

    Fingerprint

    Propellants
    Processing
    Binders
    Extrusion
    Wetting
    Microstructure

    All Science Journal Classification (ASJC) codes

    • Energy Engineering and Power Technology
    • Electrical and Electronic Engineering
    • Mechanical Engineering
    • Control and Systems Engineering
    • Aerospace Engineering

    Cite this

    Boyer, J. E., & Kuo, K. K. (1997). Influence of processing procedures and propellant ingredients on RDX-based pseudopropellant dark zone. Paper presented at 33rd Joint Propulsion Conference and Exhibit, 1997, Seattle, United States.
    Boyer, J. Eric ; Kuo, K. K. / Influence of processing procedures and propellant ingredients on RDX-based pseudopropellant dark zone. Paper presented at 33rd Joint Propulsion Conference and Exhibit, 1997, Seattle, United States.
    @conference{1485500a487748628e67ae38a83515a2,
    title = "Influence of processing procedures and propellant ingredients on RDX-based pseudopropellant dark zone",
    abstract = "Understanding the formation and influencing factors on the dark zone above RDXbased propellants is essential in the formulation of accurate models for combustion simulation. In this work, the combustion behavior and flame zone structure of various RDXbased pseudopropellants were compared to neat RDX and actual XM39 propellant. It was found that the existence of a dark zone over the pseudopropellant samples was dependent on the processing procedure used. No shock-precipitated pressed samples showed a dark zone at any test condition. However, an extrusion process utilizing ethyl acetate solvent produced pseudo-XM39 that duplicated the combustion behavior and flame structure of actual XM39 at the reference test conditions of 150 psig (1.13 MPa) and 300 psig (2.17 MPa) in N2 atmosphere. RDX/CAB (80/20) pseudopropellant also showed a dark zone of approximately 4 mm at 300 psig. As shown by other researchers, the addition of binders to RDX is a necessary condition in the formation of a dark zone over the burning surface. However, it is shown here not to be a sufficient condition, as pressed pseudopropellants showed flame attachment without dark zones. It is believed that the microstructure of propellant is an important factor in dark zone formation. With the CAB binder matrix wetting and surrounding RDX particles in extruded samples, dark zones were observed.",
    author = "Boyer, {J. Eric} and Kuo, {K. K.}",
    year = "1997",
    month = "1",
    day = "1",
    language = "English (US)",
    note = "33rd Joint Propulsion Conference and Exhibit, 1997 ; Conference date: 06-07-1997 Through 09-07-1997",

    }

    Boyer, JE & Kuo, KK 1997, 'Influence of processing procedures and propellant ingredients on RDX-based pseudopropellant dark zone' Paper presented at 33rd Joint Propulsion Conference and Exhibit, 1997, Seattle, United States, 7/6/97 - 7/9/97, .

    Influence of processing procedures and propellant ingredients on RDX-based pseudopropellant dark zone. / Boyer, J. Eric; Kuo, K. K.

    1997. Paper presented at 33rd Joint Propulsion Conference and Exhibit, 1997, Seattle, United States.

    Research output: Contribution to conferencePaper

    TY - CONF

    T1 - Influence of processing procedures and propellant ingredients on RDX-based pseudopropellant dark zone

    AU - Boyer, J. Eric

    AU - Kuo, K. K.

    PY - 1997/1/1

    Y1 - 1997/1/1

    N2 - Understanding the formation and influencing factors on the dark zone above RDXbased propellants is essential in the formulation of accurate models for combustion simulation. In this work, the combustion behavior and flame zone structure of various RDXbased pseudopropellants were compared to neat RDX and actual XM39 propellant. It was found that the existence of a dark zone over the pseudopropellant samples was dependent on the processing procedure used. No shock-precipitated pressed samples showed a dark zone at any test condition. However, an extrusion process utilizing ethyl acetate solvent produced pseudo-XM39 that duplicated the combustion behavior and flame structure of actual XM39 at the reference test conditions of 150 psig (1.13 MPa) and 300 psig (2.17 MPa) in N2 atmosphere. RDX/CAB (80/20) pseudopropellant also showed a dark zone of approximately 4 mm at 300 psig. As shown by other researchers, the addition of binders to RDX is a necessary condition in the formation of a dark zone over the burning surface. However, it is shown here not to be a sufficient condition, as pressed pseudopropellants showed flame attachment without dark zones. It is believed that the microstructure of propellant is an important factor in dark zone formation. With the CAB binder matrix wetting and surrounding RDX particles in extruded samples, dark zones were observed.

    AB - Understanding the formation and influencing factors on the dark zone above RDXbased propellants is essential in the formulation of accurate models for combustion simulation. In this work, the combustion behavior and flame zone structure of various RDXbased pseudopropellants were compared to neat RDX and actual XM39 propellant. It was found that the existence of a dark zone over the pseudopropellant samples was dependent on the processing procedure used. No shock-precipitated pressed samples showed a dark zone at any test condition. However, an extrusion process utilizing ethyl acetate solvent produced pseudo-XM39 that duplicated the combustion behavior and flame structure of actual XM39 at the reference test conditions of 150 psig (1.13 MPa) and 300 psig (2.17 MPa) in N2 atmosphere. RDX/CAB (80/20) pseudopropellant also showed a dark zone of approximately 4 mm at 300 psig. As shown by other researchers, the addition of binders to RDX is a necessary condition in the formation of a dark zone over the burning surface. However, it is shown here not to be a sufficient condition, as pressed pseudopropellants showed flame attachment without dark zones. It is believed that the microstructure of propellant is an important factor in dark zone formation. With the CAB binder matrix wetting and surrounding RDX particles in extruded samples, dark zones were observed.

    UR - http://www.scopus.com/inward/record.url?scp=84962860012&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84962860012&partnerID=8YFLogxK

    M3 - Paper

    ER -

    Boyer JE, Kuo KK. Influence of processing procedures and propellant ingredients on RDX-based pseudopropellant dark zone. 1997. Paper presented at 33rd Joint Propulsion Conference and Exhibit, 1997, Seattle, United States.