Abstract
Shock-induced combustion around a cylindrical projectile is numerically studied. A simplified two-step chemical reaction model is used to handle the reactions instead of realistic elementally chemical reactions. The simulations are examined with various parameters, such as projectile speed, initial pressure, projectile diameter and activation energy E1/R in the simplified chemical model, and the unsteady mode of the large-disturbance regime, whose oscillations are less regular and low in frequency, appears in all of simulation results. The oscillation periods normalized by the induction time tind for the large-disturbance regime well agree with the previous experimental and numerical observations around the spherical projectile. The histories on the stagnation streamline give us the detailed oscillation mechanism with the interaction of the bow shock and the reaction front, and the unsteadiness shows different features depending on the experimental conditions. Those results with various parameters also'revealed the characteristic relation between non-dimensional oscillation period tltind and non-dimensional diameter dllind. t/tind of large-disturbance regime always shows proportional relation to d/lind Thus, it is found that the non-dimensional diameter d/lind is the key factor to determine the oscillation period, and allows us to predict the oscillation periods by an arbitrary experimental condition.
| Original language | English |
|---|---|
| Title of host publication | 40th AIAA Aerospace Sciences Meeting and Exhibit |
| Publication status | Published - 2002 |
| Event | 40th AIAA Aerospace Sciences Meeting and Exhibit 2002 - Reno, NV, United States Duration: 2002 Jan 14 → 2002 Jan 17 |
Other
| Other | 40th AIAA Aerospace Sciences Meeting and Exhibit 2002 |
|---|---|
| Country | United States |
| City | Reno, NV |
| Period | 02/1/14 → 02/1/17 |
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ASJC Scopus subject areas
- Space and Planetary Science
- Aerospace Engineering
Cite this
Characteristics of shock-induced combustion around hypersonic cylindrical projectiles into combustible gases. / Kamiyama, Y.; Matsuo, Akiko.
40th AIAA Aerospace Sciences Meeting and Exhibit. 2002.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Characteristics of shock-induced combustion around hypersonic cylindrical projectiles into combustible gases
AU - Kamiyama, Y.
AU - Matsuo, Akiko
PY - 2002
Y1 - 2002
N2 - Shock-induced combustion around a cylindrical projectile is numerically studied. A simplified two-step chemical reaction model is used to handle the reactions instead of realistic elementally chemical reactions. The simulations are examined with various parameters, such as projectile speed, initial pressure, projectile diameter and activation energy E1/R in the simplified chemical model, and the unsteady mode of the large-disturbance regime, whose oscillations are less regular and low in frequency, appears in all of simulation results. The oscillation periods normalized by the induction time tind for the large-disturbance regime well agree with the previous experimental and numerical observations around the spherical projectile. The histories on the stagnation streamline give us the detailed oscillation mechanism with the interaction of the bow shock and the reaction front, and the unsteadiness shows different features depending on the experimental conditions. Those results with various parameters also'revealed the characteristic relation between non-dimensional oscillation period tltind and non-dimensional diameter dllind. t/tind of large-disturbance regime always shows proportional relation to d/lind Thus, it is found that the non-dimensional diameter d/lind is the key factor to determine the oscillation period, and allows us to predict the oscillation periods by an arbitrary experimental condition.
AB - Shock-induced combustion around a cylindrical projectile is numerically studied. A simplified two-step chemical reaction model is used to handle the reactions instead of realistic elementally chemical reactions. The simulations are examined with various parameters, such as projectile speed, initial pressure, projectile diameter and activation energy E1/R in the simplified chemical model, and the unsteady mode of the large-disturbance regime, whose oscillations are less regular and low in frequency, appears in all of simulation results. The oscillation periods normalized by the induction time tind for the large-disturbance regime well agree with the previous experimental and numerical observations around the spherical projectile. The histories on the stagnation streamline give us the detailed oscillation mechanism with the interaction of the bow shock and the reaction front, and the unsteadiness shows different features depending on the experimental conditions. Those results with various parameters also'revealed the characteristic relation between non-dimensional oscillation period tltind and non-dimensional diameter dllind. t/tind of large-disturbance regime always shows proportional relation to d/lind Thus, it is found that the non-dimensional diameter d/lind is the key factor to determine the oscillation period, and allows us to predict the oscillation periods by an arbitrary experimental condition.
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M3 - Conference contribution
AN - SCOPUS:84894358861
BT - 40th AIAA Aerospace Sciences Meeting and Exhibit
ER -