Combustion, Explosion, and Shock Waves最新文献_第4页

Pocket Model with a Tetrahedral Cell for Aluminum Agglomeration in Composite Propellants 复合推进剂中铝团聚的四面体单元口袋模型

IF 1.2 4区工程技术

Combustion, Explosion, and Shock Waves Pub Date : 2023-12-01 DOI: 10.1134/s0010508223060114

引用次数: 0

Flames with Alternating-Sign Velocity in Methane–Air and Methane–Air–Coal Dust Mixtures in a Closed Vertical Tube 密闭垂直管内甲烷-空气和甲烷-空气-煤尘混合物中速度变化的火焰

IF 1.2 4区工程技术

Combustion, Explosion, and Shock Waves Pub Date : 2023-11-21 DOI: 10.1134/s0010508223050015

A. V. Pinaev, P. A. Pinaev

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Effect of Aluminum Content and Mechanical Activation on Ti–Si–Al Synthesis 铝含量和机械活化对Ti-Si-Al合成的影响

IF 1.2 4区工程技术

Combustion, Explosion, and Shock Waves Pub Date : 2023-11-21 DOI: 10.1134/s0010508223050052

N. A. Kochetov

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Subgrid-Scale Models for Predicting Premixed Methane–Air Flame Propagating in a Chamber with a Rectangular Obstacle 预混合甲烷-空气火焰在矩形障碍室内传播的亚网格尺度模型

IF 1.2 4区工程技术

Combustion, Explosion, and Shock Waves Pub Date : 2023-11-21 DOI: 10.1134/s0010508223050155

G. Luo, L. J. Zhang, J. Q. Fang

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Droplet Size Impact on n-Heptane Detonation 液滴尺寸对正庚烷爆轰的影响

IF 1.2 4区工程技术

Combustion, Explosion, and Shock Waves Pub Date : 2023-11-21 DOI: 10.1134/s0010508223050131

R. Safari Gh., A. M. Tahsini

引用次数: 1

Analyzing the Possibility of Burning the Launcher Nose Cone Elements 分析发射筒鼻锥元件燃烧的可能性

IF 1.2 4区工程技术

Combustion, Explosion, and Shock Waves Pub Date : 2023-11-21 DOI: 10.1134/s0010508223050039

V. A. Arkhipov, A. A. Glazunov, N. N. Zolotorev, E. A. Kozlov, A. G. Korotkikh, V. T. Kuznetsov, V. I. Trushlyakov

引用次数: 0

Combustion Stability of Mixtures of Titanium with Soot to the Local Excess of the Component 钛与烟灰混合物的燃烧稳定性及组分的局部过量

IF 1.2 4区工程技术

Combustion, Explosion, and Shock Waves Pub Date : 2023-11-21 DOI: 10.1134/s0010508223050027

S. V. Kostin, P. M. Krishenik

引用次数: 0

Deflagration-to-Detonation Characteristics and Detonation Wave Structure of the Flake Aluminum Powder–Air Mixture 片状铝粉-空气混合物的爆燃爆轰特性及爆轰波结构

IF 1.2 4区工程技术

Combustion, Explosion, and Shock Waves Pub Date : 2023-11-21 DOI: 10.1134/s0010508223050143

Q. Jing, D. Wang, C.-L. Shi, Q.-M. Liu, Y. Shen, Z.-S. Wang, C.-Q. Liu, Z. Yang, Z.-L. He, X. Chen, S.-Z. Li, J.-X. Huang

{"title":"Deflagration-to-Detonation Characteristics and Detonation Wave Structure of the Flake Aluminum Powder–Air Mixture","authors":"Q. Jing, D. Wang, C.-L. Shi, Q.-M. Liu, Y. Shen, Z.-S. Wang, C.-Q. Liu, Z. Yang, Z.-L. He, X. Chen, S.-Z. Li, J.-X. Huang","doi":"10.1134/s0010508223050143","DOIUrl":"https://doi.org/10.1134/s0010508223050143","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The explosion process of the flake aluminum powder–air two-phase flow is experimentally studied in a large-scale long straight horizontal tube with a length of 32.4 m and an inner diameter of 0.199 m. The deflagration-to-detonation transition (DDT) of the aluminum powder–air mixture is analyzed after being ignited by a 40-J electric spark, and the DDT of the mixture at different mass concentrations is compared. The results show that self-sustained detonation can be achieved in the range of 286–532 g/m<sup>3</sup> of the flake aluminum powder concentration, and the DDT process of the aluminum powder–air mixture at the concentration of aluminum particles 409 g/m<sup>3</sup> (optimal concentration) is analyzed in detail. The detonation velocity and detonation pressure at the optimal concentration are 1690 m/s and 58 bar, respectively. During the self-sustained detonation stage, the detonation overpressure of the multiphase fuel–air mixture exhibits a typical constant oscillation characteristic, while the detonation velocity remains stable. In addition, a double-headed mode helical detonation phenomenon is observed in the detonation wave front of the aluminum powder–air mixture. The structure of the detonation wave, the flow field parameters, and the interaction between the shock wave and the three-wave point trajectory are analyzed. The detonation cell size at the optimal concentration is approximately 486 mm.</p>","PeriodicalId":10509,"journal":{"name":"Combustion, Explosion, and Shock Waves","volume":"16 2","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138523863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Relaxation of Light Emission from Hot Spots Depending on the Characteristics of the Environment 热点光发射随环境特性的弛豫

IF 1.2 4区工程技术

Combustion, Explosion, and Shock Waves Pub Date : 2023-11-21 DOI: 10.1134/s0010508223050088

S. A. Bordzilovskii, S. M. Karakhanov, A. V. Plastinin

{"title":"Relaxation of Light Emission from Hot Spots Depending on the Characteristics of the Environment","authors":"S. A. Bordzilovskii, S. M. Karakhanov, A. V. Plastinin","doi":"10.1134/s0010508223050088","DOIUrl":"https://doi.org/10.1134/s0010508223050088","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The light emission from samples consisting of a transparent matrix with inclusions of hot spots was studied. The matrix material was water and epoxy resin. Hot spots were generated by shock compression of MS-V hollow glass microballoons. In the pressure range 0.7–29 GPa, a brightness decay time of 280 to 70 ns was recorded. The brightness decay time increased by more than an order of magnitude when replacing the optical window made of solid epoxy resin by LiF. However, even this increased time of brightness decay is much shorter than the estimated times of hot-spot temperature relaxation due to heat conduction in the calculation with stationary parameters (<span>(t_{a} = 10^{- 2})</span> s) and due to light emission (<span>(tau = 2.4 cdot 10^{-3})</span> s). It is concluded that the dominant mechanism of temperature relaxation is the turbulent mixing of the medium behind the shock-wave front. The experimental results show that in numerical simulations of the temperature field during shock-wave propagation through a pore, it is necessary to take into account the viscosity and strength of the matrix material.</p>","PeriodicalId":10509,"journal":{"name":"Combustion, Explosion, and Shock Waves","volume":"6 6","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138523840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On Electromagnetic Measurements of Particle Velocity 粒子速度的电磁测量

IF 1.2 4区工程技术

Combustion, Explosion, and Shock Waves Pub Date : 2023-11-21 DOI: 10.1134/s0010508223050076

A. P. Ershov

{"title":"On Electromagnetic Measurements of Particle Velocity","authors":"A. P. Ershov","doi":"10.1134/s0010508223050076","DOIUrl":"https://doi.org/10.1134/s0010508223050076","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>One of the shortcomings of the classical electromagnetic method of Zavoisky is sensitivity to the non-one-dimensionality of the flow behind the wave front. In this paper, it is proposed to use a four-pin gauge to correct measurements. Two signals are recorded from <span>(Pi)</span>-shaped gauges, one of which is located in a plane tangent to the front, and the other in a plane parallel to the direction of wave propagation. Next, the two signals are combined into a true velocity signal that is insensitive to the curvature of the front. The second difficulty that arises in electromagnetic measurements is the rather large size of the gauges. Typically, the length of the working arm <span>(L)</span> is about 1 cm. An analysis of the potential distribution in the gauge shows that the proposed combined gauge is equivalent to two sensors of zero width, and the effective length <span>(L)</span> is the distance between the midlines of the leads. It is shown that the value of <span>(L)</span> can be reduced to 1.5–2 mm with a lead width of about 0.5 mm. This makes it possible to perform local measurements at spots of millimeter size and use small-size charges. These improvements bring electromagnetic measurements closer to the level of modern optical techniques while using much cheaper equipment.</p>","PeriodicalId":10509,"journal":{"name":"Combustion, Explosion, and Shock Waves","volume":"36 12","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138523858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0