Scale effect of spherical projectiles for stabilization of oblique detonation waves

Maeda, Satoshi; Sumiya, Satoshi; Kasahara, Jiro; Matsuo, Akiko

doi:10.1007/s00193-015-0549-4

Cited by 20 publications

(7 citation statements)

References 26 publications

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“…For example, [28] shows that for simulation of the detonation initiation and the deflagration to detonation transition, it is preferable to use complex models of chemical transformations. However, the results of this study enable to conclude that the used of the one-stage kinetics adequately describes the combustion of hydrogen in air, as will be shown later by the agreement between the experimental data [22] and the theoretical model [25].…”

Section: Figure 6 Map Of Modes (○•) -Oblique Detonation Wave (Odw); (◊♦) -Straw-hat Mode With a Stabilized Odw; (δ▲) -Straw-hat Mode Withsupporting

confidence: 56%

“…Fig. 4 shows a comparison of the numerically obtained modes of oblique detonation waves (a−c) and shock-induced combustion (d) and the experimental shadow images given in [22] for a sphere with a diameter of 3.18 mm. In the modeling, good qualitative agreement was obtained between the calculated and experimental data.…”

Section: Resultsmentioning

confidence: 99%

“…In [22], a spherical projectile with a diameter d = 3.18 mm was used. In our work, in addition to the calculations based on experimental data, a series of calculations was performed with varying projectile diameter at P st = 121 kPa and Pst = 141 kPa.…”

Section: Figure 1 Simulation Domain Schematicmentioning

confidence: 99%

“…The modes are presented as functions of the ratio of the projectile diameter to the detonation cell size and the ratio of the flight velocity to the Chapman−Jouguet detonation velocity. Null symbols refer to the experimental data [22], and filled symbols to the present calculations. Figure 6 shows that the calculated and experimental points for the corresponding detonation modes are close to each other.…”

Section: Figure 6 Map Of Modes (○•) -Oblique Detonation Wave (Odw); (◊♦) -Straw-hat Mode With a Stabilized Odw; (δ▲) -Straw-hat Mode Withmentioning

confidence: 99%

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Estimation of the energy of detonation initiation in a hydrogen-oxygen mixture by a high-velocity projectile

Бедарев

Temerbekov

2021

THERM SCI

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The paper presents the results of a numerical study of the initiation of oblique detonation modes by a high-velocity projectile moving in an argon-diluted hydrogen?oxygen mixture. The simulation of oblique detonation wave modes showed that calculated and experimental flow patterns agree. The calculated detonation cell size agreed with experimental data. For the initial pressure Pst = 121 kPa and Pst = 141 a series of calculations were carried out for a different projectile diameters. The detonation initiation energy was estimated, and the results were compared with theoretical models.

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Section: Figure 6 Map Of Modes (○•) -Oblique Detonation Wave (Odw); (◊♦) -Straw-hat Mode With a Stabilized Odw; (δ▲) -Straw-hat Mode Withsupporting

confidence: 56%

Section: Resultsmentioning

confidence: 99%

Section: Figure 1 Simulation Domain Schematicmentioning

confidence: 99%

Section: Figure 6 Map Of Modes (○•) -Oblique Detonation Wave (Odw); (◊♦) -Straw-hat Mode With a Stabilized Odw; (δ▲) -Straw-hat Mode Withmentioning

confidence: 99%

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Estimation of the energy of detonation initiation in a hydrogen-oxygen mixture by a high-velocity projectile

Бедарев

Temerbekov

2021

THERM SCI

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“…In addition to the wedge flow and conical flow, the spherical flow is another major concern for ODW initiation and standing stability. For the spherical flow, experiments on hypervelocity projectiles were comprehensively conducted by some researchers [19][20][21][22][23]. They conducted a series of parameter studies and investigated the criticality of stabilized ODWs around a spherical projectile.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Disturbance Resistance of Oblique Detonation Waves

Liu

Xiao

Wang

et al. 2020

International Journal of Aerospace Engineering

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The stability of oblique detonation waves (ODWs) is a fundamental problem, and resistance of ODWs against disturbances is crucial for oblique detonation engines in high-speed propulsion. In this work, numerical studies on ODW stability in disturbed flows are conducted using the two-dimensional reactive Euler equations with a two-step induction-reaction kinetic model. Two kinds of flow disturbances are, respectively, introduced into the steady flow field to assess ODW stability, including upstream transient high-pressure disturbance (UTHD) and downstream jet flow disturbance (DJFD) with different durations. Generally, an ODW is susceptible to disturbances at larger wedge angles and stable at smaller wedge angles. In the unstable wedge angle range, different ODW structures and transition patterns are obtained after disturbances, including different locations of the primary triple points, different numbers of the steady triple points on the wave surface, and different transition patterns from the leading oblique shock wave to the ODW. It is found that the primary triple point tends to move upstream for the disturbances that can form a local strong detached bow shock wave near the wedge tip. In contrast, the wave surface and the transition pattern are susceptible to all of the disturbances introduced in this study. Despite the unstable responses of the ODWs to the disturbances, the ODWs can keep standing stability after disturbances, which is beneficial to the propulsion application of ODWs.

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Hysteresis phenomenon of the oblique detonation wave

Wang

Xiao

et al. 2018

Combustion and Flame

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Scale effect of spherical projectiles for stabilization of oblique detonation waves

Cited by 20 publications

References 26 publications

Estimation of the energy of detonation initiation in a hydrogen-oxygen mixture by a high-velocity projectile

Estimation of the energy of detonation initiation in a hydrogen-oxygen mixture by a high-velocity projectile

Numerical Study of Disturbance Resistance of Oblique Detonation Waves

Hysteresis phenomenon of the oblique detonation wave

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