Laser measurements of solid-particle rebound parameters impacting on2024 aluminum and 6A1-4V titanium alloys

Tabakoff, W.; Malak, M.; Hamed, A.

doi:10.2514/3.9688

Cited by 55 publications

(9 citation statements)

References 3 publications

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“…Aircraft engines and structures can face several kind of impacts, mainly during take off and landing, such as from birds [1], tyre debris [2,3,4], hail [5] or sand [6,7,8]. These kinds of impacts can induce damage in some parts of the aircraft structure and lead eventually to an aircraft crash.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Experimental investigation of the kinematics of post-impact ice fragments

Guégan

Othman

Lebreton

et al. 2011

International Journal of Impact Engineering

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Hail is more hazardous for aircraft engines compared to rain and snow, mainly, because of its solid nature and high water content. In extreme cases it can lead to engine flame out. In order to avoid such situations, aero engines should be designed to withstand hail ingestion. For this purpose we have studied the post-impact characteristics of ice, such as particle velocity and directions of travel. To achieve this goal, a large experimental program has been undertaken, in which spherical ice specimens were projected against a rigid plate. Three specimen diameters (6.2, 12.9 and 27.5 mm) and four impact angles (20, 45, 75 and 90 •) were considered, as well as a wide range of impact velocities (60-200 m/s).

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Section: Accepted Manuscriptmentioning

confidence: 99%

Experimental investigation of the kinematics of post-impact ice fragments

Guégan

Othman

Lebreton

et al. 2011

International Journal of Impact Engineering

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“…In the following research, collision models in different experimental conditions were designed by various researchers. In 1987, Tabakofft [8] carried out a particle-wall collision experiment in gas-solid two-phase flow, which took wall materials in account. They used the method of laser measurement to conclude collision models of particles with 410 stainless steel, 2024 aluminum alloy, and 6a1-4 v titanium alloy.…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical analysis of large particle–wall collision with different metal plates

Chen

2022

J Braz. Soc. Mech. Sci. Eng.

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The coefficients of restitution are important parameters in the study of particle–wall collision, which is widely used in discrete element modeling in solid–liquid multiphase systems. To improve the accuracy of numerical simulations, correspondingly exact particle–wall collision parameters are needed. The current models used in numerical simulation, however, are mostly suitable for solid–gas systems, in which collision models used to be micro-sized. Millimeter-size particle–wall collision models in wet experimental conditions and research on the influence of plate materials were lacking. In this study, we designed an experimental system focused on the different materials of the particles and collision plates and the dry or wet experimental environment to discuss the change of restitution coefficients in various conditions. We selected millimeter-sized iron 45 particles and glass particles, which represented plastic material and hard brittle material, respectively. We also selected three industrial metals, HT250 gray cast iron, 6061 aluminum alloy, and 316 stainless steel, which are commonly used in hydraulic machinery, for the collision plates. Experiments were performed to measure the incident and rebound velocities of the particle at various impact angles. In this paper, we have provided and compared the results of restitution coefficients of velocity and angle varying with the approach angle. In the processing of the experiment, we used the control variate method and applied an ultra-depth of field three-dimensional microscope to scan the surface of the collision plate. In the analysis of the experimental results, single particle–wall collision was seen as a non-smooth dynamical system to discuss the specific phenomenon. Finally, we obtained the relationship between the restitution of normal velocity and elastic elements of materials and explained the relationship of stick–slip motion with the approach angle and velocity.

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“…Отраженные частицы существенно влияют на структуру и свойства течения дисперсной примеси. В классической механике многофазных течений [1] и в подавляющем большинстве современных работ, в которых рассматривается обтекание тел потоком газа с учетом отскока (отражения) частиц, их форма принимается сферической, а их отскок от поверхности считается регулярным (см., например, обзор [3]). Однако в реальных течениях частицы, например, песок, вулканический пепел или синтетический корунд, всегда имеют несферическую, иногда очень сложную форму.…”

Section: Introductionunclassified

“…Отскок таких частиц имеет стохастический характер, что связано с их случайной ориентацией в момент столкновения. Наряду с возможной шероховатостью обтекаемой поверхности это приводит в экспериментах к значительному разбросу данных по параметрам отскока частиц [3][4][5].…”

Section: Introductionunclassified

Модель Отскока И Рассеяния Несферических Частиц При Высокоскоростном Взаимодействии С Обтекаемой Поверхностью

Панфилов¹,

Циркунов²

2022

Журнал Технической Физики

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A new model is proposed for a non-spherical solid particles' impact interaction with a surface as applied to gas-particle flows over surfaces. The range of a particle impact speed typical for a vehicle flight in a dusty atmosphere is considered. The model is based on the laws of mechanics and experimental data on the restitution coefficient of the particle normal velocity. The tangential force impulse during a particle-surface interaction is assumed to be proportional to both the normal impulse and the mean tangential velocity of the particle contact point. The space orientation of incident particles relative to the surface is considered as random. The rebound of particles of different shape with varying shape parameters and of a particle mixture is studied numerically. Statistical characteristics of particles' rebound and scattering are obtained. Comparison with the known experimental data of numerical results for the mean values of the normal and tangential velocities of the particles' gravity centers in the plane of impact after rebound showed their good agreement.

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Laser measurements of solid-particle rebound parameters impacting on2024 aluminum and 6A1-4V titanium alloys

Cited by 55 publications

References 3 publications

Experimental investigation of the kinematics of post-impact ice fragments

Experimental investigation of the kinematics of post-impact ice fragments

Experimental and theoretical analysis of large particle–wall collision with different metal plates

Модель Отскока И Рассеяния Несферических Частиц При Высокоскоростном Взаимодействии С Обтекаемой Поверхностью

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