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NUMERICAL SIMULATION OF THE COMPACTION EFFECT DURING THE SHOCK WAVE–PARTICLE LAYER INTERACTION 激波-粒子层相互作用中压实效应的数值模拟
Detonation: Latest accomplishments Pub Date : 2021-06-30 DOI: 10.30826/icpcd12b10
Yaroslava E. Poroshyna, P. Utkin
{"title":"NUMERICAL SIMULATION OF THE COMPACTION EFFECT DURING THE SHOCK WAVE–PARTICLE LAYER INTERACTION","authors":"Yaroslava E. Poroshyna, P. Utkin","doi":"10.30826/icpcd12b10","DOIUrl":"https://doi.org/10.30826/icpcd12b10","url":null,"abstract":"The work presents the results of numerical simulation of the experiment (Gelfand, B. E., et al. 1989. Archivum Combustionis) on the interaction of a shock wave (SW) with a particle layer near the impermeable wall. The mathematical model is based on the solution of Baer–Nunziato (BN) system of equations and takes into account compaction of the solid phase of particles. The numerical algorithm is based on the Godunov method with the pressure relaxation procedure for the stable computation of explicit interfacial boundaries. The shape of the pressure curve obtained on the wall under particle layer is explained from the point of view of wave processes in the layer. A quantitative comparison of the experimental and simulated pressure curves is carried out. Parametric studies of the influence of compaction law parameters on the simulation results are conducted. The simulation results are quantitatively compared with the calculations (Kutushev, A. G., and D. A. Rudakov. 1993. J. Appl. Mech. Tech. Phy.) performed using the equations of R. I. Nigmatulin. Differences in the results using two models of two-phase flow are discussed.","PeriodicalId":426460,"journal":{"name":"Detonation: Latest accomplishments","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133720488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
INFLUENCE OF PRESSURE ON THE UNSTEADY WALL HEAT FLUX DURING A SELF-SUSTAINED DETONATION: AN EXPERIMENTAL INVESTIGATION 压力对自持爆轰过程中非定常壁热流影响的实验研究
Detonation: Latest accomplishments Pub Date : 2021-06-30 DOI: 10.30826/icpcd12b07
H. Quintens, Q. Michalski, F. Virot, J. Sotton, M. Bellenoue
{"title":"INFLUENCE OF PRESSURE ON THE UNSTEADY WALL HEAT FLUX DURING A SELF-SUSTAINED DETONATION: AN EXPERIMENTAL INVESTIGATION","authors":"H. Quintens, Q. Michalski, F. Virot, J. Sotton, M. Bellenoue","doi":"10.30826/icpcd12b07","DOIUrl":"https://doi.org/10.30826/icpcd12b07","url":null,"abstract":"This study experimentally investigates the unsteady wall heat transfer during the propagation of a steady detonation in a cylindrical tube. More particularly, this work focuses on the time evolution of the heat flux relatively to the detonation cell. A stoichiometric methane/hydrogen–oxygen mixture diluted with argon is used in order to obtain large and stable detonation cells. Type-E thermocouples, embedded into the wall, flushed mounted and aligned along a detonation tube, measured successively the wall temperature lift, during a detonation propagation.","PeriodicalId":426460,"journal":{"name":"Detonation: Latest accomplishments","volume":"12 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113962928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
FAST COMPLEX FOR MONITORING DROPLETS AND VAPORS IN CLOUDS AND AEROSOL FLOWS AT PULSED INJECTION OF LIQUID FUELS INTO THE ATMOSPHERE 用于监测云中的液滴和蒸气以及脉冲向大气中喷射液体燃料时的气溶胶流动的快速复合体
Detonation: Latest accomplishments Pub Date : 2021-06-30 DOI: 10.30826/icpcd12b12
A. Zagnitko, N. P. Zaretskiy, I. Matsukov, V. Pimenov, S. Salnikov, D. Y. Fedin
{"title":"FAST COMPLEX FOR MONITORING DROPLETS AND VAPORS IN CLOUDS AND AEROSOL FLOWS AT PULSED INJECTION OF LIQUID FUELS INTO THE ATMOSPHERE","authors":"A. Zagnitko, N. P. Zaretskiy, I. Matsukov, V. Pimenov, S. Salnikov, D. Y. Fedin","doi":"10.30826/icpcd12b12","DOIUrl":"https://doi.org/10.30826/icpcd12b12","url":null,"abstract":"The reliable assessment of the consequences of accidental injection, leaks, spills, and precipitation accompanied by the formation of aerosol and vapor clouds is needed for ensuring the industrial safety of the facilities involved in the manufacture, storage, and transportation of liquid fuels and liquefied natural gas (LNG) [1–8]. Such accidental events usually start from the uncontrolled outflow of liquid fuel and LNG followed by evaporation and mixing of fuel vapors, methane and vapors containing a wide fraction of light hydrocarbons, including ethane, propane, butane, and other light alkanes, with an ambient atmosphere. For example, the mixtures of LNG with air are flammable and explosive at concentration C = 5–15 %(vol.) [1–9]; so, the development of physical and chemical means for fast and remote monitoring is of both scientific interest and practical importance for the environment and development of safe and clean energy. The data on the composition of hydrocarbon clouds required for modeling large-scale accidents at fuel and energy facilities associated with pulsed technogenic and/or unauthorized injection of combustible liquids and LNG into the atmosphere and with its spilling and precipitation on the ground are limited [1–8]. Experimental analyses of them are quite complex. In addition, due to potential danger posed by mixtures of hydrocarbons and air, we must perform remote analyses of them at distances of up to 5–10 km with fast data transfer to main information collection server cite1-zg, 2-zg, 3-zg, 4-zg, 5-zg. Finally, along with technical difficulties, large-scale experiments require substantial financial and resource support. The aim of this work was to develop the fast complex for monitoring of droplets and aerosol flows at pulsed injection of liquid fuels and LNG into the atmosphere for the detonation purposes.","PeriodicalId":426460,"journal":{"name":"Detonation: Latest accomplishments","volume":"294 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114496448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
DETONATION STRUCTURES IN A SUPERSONIC ANNULAR RAMJET CHAMBER 超音速环形冲压发动机燃烧室的爆轰结构
Detonation: Latest accomplishments Pub Date : 2021-06-30 DOI: 10.30826/icpcd12b09
A. V. Trotsyuk
{"title":"DETONATION STRUCTURES IN A SUPERSONIC ANNULAR RAMJET CHAMBER","authors":"A. V. Trotsyuk","doi":"10.30826/icpcd12b09","DOIUrl":"https://doi.org/10.30826/icpcd12b09","url":null,"abstract":"The results of a systematic study of the structures and flow regimes with an oblique detonation wave (ODW) in an annular ramjet straight-flow detonation chamber (DC) of a new type have been presented. In the combustor with a new design, detonation burning of the reacting mixture is organized by using a compression body shaped as a continuous monofilar spiral with a constant pitch angle. Numerical simulations are performed for a supersonic flow of a stoichiometric hydrogen–air mixture with Mach number M0=3 and 5 at the combustor entrance. A mathematical model of the reacting flow in the combustor is developed in a two-dimensional (2D) unsteady formulation. The flow dynamics for the two different operation start types of DC and the final structure of the steady flow in the combustor are numerically studied. Various geometric parameters of the DC are considered (length, radius, and spiral pitch angle). A bifurcation of the steady flow structures with respect to the initial conditions of combustor start is detected for some combinations of the DC geometric parameters.","PeriodicalId":426460,"journal":{"name":"Detonation: Latest accomplishments","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123150577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
DETONATION INITIATION IN A COMBUSTIBLE GAS MIXTURE AT INTERACTION OF A SHOCK WITH INERT GAS BUBBLE 在可燃气体混合物中激波与惰性气泡相互作用下的爆轰起爆
Detonation: Latest accomplishments Pub Date : 2021-06-30 DOI: 10.30826/icpcd12b01
P. Georgievskiy, V. Levin, O. Sutyrin
{"title":"DETONATION INITIATION IN A COMBUSTIBLE GAS MIXTURE AT INTERACTION OF A SHOCK WITH INERT GAS BUBBLE","authors":"P. Georgievskiy, V. Levin, O. Sutyrin","doi":"10.30826/icpcd12b01","DOIUrl":"https://doi.org/10.30826/icpcd12b01","url":null,"abstract":"Using the Euler equations for a perfect gas with an inhomogeneous distribution of molar mass, the interaction of a shock wave in a combustible gas with an elliptic bubble of an inert gas of increased density is simulated in plane two-dimensional formulation. Various values of the Mach number M of the incident wave and the ratio of bubble axles are considered. A finite-volume S. K. Godunov-type method of the second order of approximation with HLLC (Harten – Lax – van Leer-contact) Riemann solver is used for numerical simulation. The combustion reaction of the gas mixture is modeled using the two-stage Korobeynikov–Levin kinetics. Various regimes of mixture ignition are described. At sufficiently large Mach numbers of the incident wave, the combustion of the mixture is initiated directly due to heating in the shock wave. For weaker shocks, ignition may occur when the incident shock wave is reflected from the gas interface and for even weaker shocks, upon the shock focusing near the leeward pole of the bubble. It is shown that the shape of the bubble also plays an important role, in some cases providing the initiation of combustion by a weaker wave, or, conversely, the absence of ignition.","PeriodicalId":426460,"journal":{"name":"Detonation: Latest accomplishments","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126550437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
REACTIVE EULER MODEL FOR DETONATION PROPAGATION IN A NONUNIFORM MEDIUM 非均匀介质中爆轰传播的反应欧拉模型
Detonation: Latest accomplishments Pub Date : 2021-06-30 DOI: 10.30826/icpcd12b04
A. Kasimov, A. Y. Goldin
{"title":"REACTIVE EULER MODEL FOR DETONATION PROPAGATION IN A NONUNIFORM MEDIUM","authors":"A. Kasimov, A. Y. Goldin","doi":"10.30826/icpcd12b04","DOIUrl":"https://doi.org/10.30826/icpcd12b04","url":null,"abstract":"In recent work [1], the analog Burgers model of detonation [2] was used to explore how detonation wave propagates in a medium with a periodically varying reactivity. It was found that the upstream state variations influence both the stability of the steady-state traveling wave solutions and the character of the ensuing instabilities. Interactions with upstream-state periodicity lead to complex nonlinear oscillations of the solution that includes existence of nonlinear wavepackets, period-doubling bifurcations, frequency locking, and resonance. In this work, we generalize [1] to the case of reactive Euler equations. The nonuniformity is modeled by periodic variations of the mixture parameters in the upstream state. Existence of mode locking and resonance, in precise analogy with the reactive Burgers model, is found and explored for the more realistic model of detonations.","PeriodicalId":426460,"journal":{"name":"Detonation: Latest accomplishments","volume":"1728 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134275998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
BURNING OF THE MIXTURE OF LIQUID KEROSENE AND AIR IN THE DETONATION CHAMBER 503 MM IN DIAMETER WITH VARIATIONS OF ITS GEOMETRY 液体煤油和空气的混合物在直径503毫米的不同几何形状的爆震室中燃烧
Detonation: Latest accomplishments Pub Date : 2021-06-30 DOI: 10.30826/icpcd12b15
F. A. Bykovskii, S. A. Zhdan, E. F. Vedernikov
{"title":"BURNING OF THE MIXTURE OF LIQUID KEROSENE AND AIR IN THE DETONATION CHAMBER 503 MM IN DIAMETER WITH VARIATIONS OF ITS GEOMETRY","authors":"F. A. Bykovskii, S. A. Zhdan, E. F. Vedernikov","doi":"10.30826/icpcd12b15","DOIUrl":"https://doi.org/10.30826/icpcd12b15","url":null,"abstract":"Regimes of continuous detonation of heterogeneous mixtures of aviation kerosene and air are obtained for the first time and studied in a flow-type annular cylindrical chamber 503 mm in diameter with variations of its geometry: air supply slot, kerosene injectors, and combustor geometry. The air flow rate is changed in the interval 8.4–33.7 kg/s, the kerosene flow rate is changed in the interval 1.38–2.05 kg/s, and the equivalence ratio is changed from 0.88 tO2.8. Kerosene is bubbled with air. Regimes of continuous multifront detonation (CMD) are observed in the case of combustor duct constriction at the exit. Based on the pressure measured at the combustor exit, specific impulses are determined. The maximum specific impulse with allowance for the energy of compressed air in the receivers is approximately 1400 s.","PeriodicalId":426460,"journal":{"name":"Detonation: Latest accomplishments","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128522856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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