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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.149 SNIP: 0.16 CiteScore™: 0.29

ISSN Печать: 2150-766X
ISSN Онлайн: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v8.i6.70
pages 555-570

COMBUSTION MECHANISM OF TETRA-OL GLYCIDYL AZIDE POLYMER AND ITS APPLICATION TO HYBRID ROCKETS

Yutaka Wada
Akita University, 1-1, Tegata, Gakuen-machi, Akita City, Akita, 010-8502, Japan
Yoshio Seike
NOF Corporation, JAPAN
Makihito Nishioka
University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki, 305-8577, Japan
Nobuyuki Tsuboi
Kyushu Institute of Technology
Toru Shimada
ISAS, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
Katsuya Hasegawa
Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Japan
Kiyokazu Kobayashi
Institute of Space & Astronautical Science/Japan Aeropace Exploration Agency (JAXA), Japan
Keiichi Hori
Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), 3-1-1 Yoshinodai, Chuo-Ku, Sagamihara, Kanagawa 252-5210, Japan

Краткое описание

A basic study to clarify the combustion mechanism of glycidyl azide polymer (GAP) has been conducted. Temperature during the strand burner and 60-mm diameter motor tests was measured. The strand tests were performed with 2.5-μm diameter S-type thermocouple, embedded in GAP samples, with pressure ranging from 1 to 10 MPa. The 60-mm diameter motor tests were done with end-burning grains and the temperature inside the motor was measured with a 1.0 mm diameter K-type thermocouple with a pressure range from 3 to 10 MPa. The motor tests show the gas temperatures to be approximately 80 K higher than the strand tests and both temperatures are significantly lower than adiabatic temperature. The efficiency of C*, ηC*, is in the range of 0.7 to 0.85 depending on pressure and L*. Combustion residue of GAP was investigated and it was found to be composed of soot (black in color), high viscosity residue, and a yellow powder, which was only observed at high pressures. These residues were analyzed by means of Scanning electron microscope (SEM) and Fourier transform infrared spectrometer (FTIR), and mass balance was also measured. One-dimensional three-phase mode combustion model of GAP has been constructed based on the Beckstead model. Modifications were made taking into account experimental observations. A blow-off mechanism was added in residue behavior and full kinetics chemistry was entrained in the bubbles at the two phase region. The burning rate and temperature profile were numerically simulated adjusting for kinetic parameters. The rapid temperature increase and final temperature are expressed well in this simulation and the calculated burning rate coincides well at medium pressures.

ЛИТЕРАТУРА

  1. Kubota, N. and Sonobe, T., Combustion Mechanism of Azide Polymer.

  2. Wang, T., Li, S., Yang, B., Huang, C., and Li, Y., Thermal Decomposition of Glycidyl Azide Polymer Studied by Synchrotoron Photoionization Mass Spectrometry.

  3. Korobeinichev, O.P., Kuibiba, L.V., Volkov, E.N., and Shmakov, A.G., Mass Spectrometric Study of Combustion and Thermal Decompositon of GAP.

  4. Zenin, A.A. and Finjakov, S.V., Physics of GAP Combustion.

  5. Puduppakkam, V.K. and Beckstead, W.M., GLYCIDYL AZIDE POLYMER Combustion Modeling.

  6. Davidson, E.J. and Beckstead, W.M., A Mechanism and Model for GAP Combustion.

  7. Puduppakkam, V.K. and Beckstead, W.M., Combustion Modeling of Glycidyl Azide Polymer with Detailed Kinetics.

  8. Kim, S.E., Yang V., and Liau, C.Y., Modeling of HMX/GAP Pseudo-Propellant Combustion.

  9. Togo, S., Kobayashi, K., Shimada, T., Niimi, Y., Seike, Y., Nishioka, M., and Hori, K., Modified Burning Rate Spectrum and Combustion Mechanism of Tetra-Ol GAP.

  10. Lengelle, G., Fourest, B., Godon, J.C., and Guin, C., Condensed Phase Behavior and Ablation Rate of Fuels for Hybrid Propulsion.

  11. Tang, C.J., Lee, Y., and Litzinger, T.A., Simultaneous Temperature and Species Measurements of the Glycidyl Azide Polymer (GAP) Propellant During Laser-Induced Decomposition.

  12. Arisawa, H. and Brill, T.B., Thermal Decomposition of Energetic Materials 71: Structure-Decomposition and Kinetc Relationships in Flash Pyrolysis of Glycidyl Azide Polymer (GAP).

  13. Kuwahara, T., Mitsuno, M., Odajima, H., Kubozuka, S., and Kubota, N., Combustion Characteristics of Gas Hybrid Rockets.

  14. Kuwahara, T., Mitsuno, M., and Odajima H., Combustion Characteristics of Gas-Hybrid Rockets.

  15. Parasad, K., Yetter, R.A., and Smooke, M.D., An Eigenvalue Method for Computing the Burning Rates of RDX Propellants.


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