Numerical modelling and experimental analysis of the passenger side airbag deployment in out-of-position

Bendjaballah, Driss; Bouchoucha, A.; Sahli, Mohamed; Gelin, Jean‐Claude

doi:10.1080/13588265.2017.1282186

Cited by 6 publications

(2 citation statements)

References 29 publications

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“…При певному співвідношенні геометричних та фізичних параметрів в результаті взаємодії надзвукового струменя та дозвукового середовища досить великий об'єм нерухомого газу навколо струменя прискорюється та переноситься в напрямку руху надзвукового струменя. Дослідження даних процесів мають значний фундаментальний і практичний інтерес та залишаються актуальними по сьогоднішній день, про що свідчить велика кількість сучасних робіт з даної тематики як експериментальних [3,4], так і теоретичних, з яких найбільшу перевагу віддається методам чисельного моделювання [5][6][7].…”

Section: вступunclassified

Modeling of Gas-Dynamic Processes in the Elements of Impulse Ejector

Voropaiev¹,

Zagumennyi²,

Rozumnyuk³

2021

JNAM

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The paper presents the numerical results on gas-dynamic processes in various elements of the impulse ejector, including pre-chamber, supersonic nozzle and mixing chamber, to determine optimal geometric parameters providing the given flow rate characteristics. At an extra-high pressure of the ejecting gas (>100 bar) it is impossible to create a nozzle design with continuously changing cross-sectional area and limited nozzle length. So, it is necessary to place a pre-chamber between the gas generator and the ejector nozzle for throttling full gas pressure. In order to optimize the pre-chamber parameters in the ejector with discrete holes of the gas generator and the operating pressure in the range of 400÷1000 bar, a series of calculations were performed to determine the pre-chamber parameters, ensuring stable operation of the supersonic annular nozzle at the high pressure of 35÷45 bar and the flow rate of 0.5÷0.6 kg/s. 3D numerical simulation of the gas flow into the pre-chamber through the gas generator holes shows the degree of the flow pattern non-uniformity in the pre-chamber at the ejector nozzle inlet is quite low. This justifies the numerical simulation of gas flow in the ejector in axisymmetric formulation and allows restricting the number of the gas generator holes without inducing significant non-uniformity in the azimuthal direction.

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Section: вступunclassified

Modeling of Gas-Dynamic Processes in the Elements of Impulse Ejector

Voropaiev¹,

Zagumennyi²,

Rozumnyuk³

2021

JNAM

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“…Key words mainly define external environment parameters, temperature of gas, size of vent hole, and mass flow rate curve (as shown in Fig. 10), which can better reflect the test performance of the airbag [15]. The airbag is easily penetrated during the contact with a rigid material.…”

Section: The Finite Element Model Of the Airbag And Boxmentioning

confidence: 99%

The modeling and simulation of collision protection system between the driver of non-motor vehicle and car door

Lai

Feng

2018

J Wireless Com Network

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Collision between the driver of non-motor vehicle and car door often happens when the car driver or the passenger in the parking car opens the door suddenly ignoring a non-motor vehicle passing by. The collision protection system is proposed by installing an airbag in the car door. When the collision accident between the driver of non-motor vehicle and the car is unavoidable, the airbag will automatically deploy to provide head protection for the driver of non-motor vehicle. Utilizing HyperWorks and LS-DYNA, the finite element model of the collision is established to simulate the situations of installing airbag or not with the door on different opening angles (60°, 70°) and to verify the feasibility of the proposed method.

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Research on the Process of Dispersing the Bullet by a Large-Size Gasbag with Multiple Inlet Nozzles Based on the Fluid–Structure Interaction Method

Wang,

Liu,

Jiang

et al. 2023

Int. J. Aeronaut. Space Sci.

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To meet the needs of the airborne dispenser to disperse large-mass bullets, the dispersal system of large-size gasbag with multiple inlet nozzles was designed and built. The rationality and feasibility of the dispersal system were verified by the experimental study of the interior ballistic process. On this basis, the fluid–structure interaction method was used to simulate and analyze the process of the gasbag propelling the bullet when the number of inlet nozzles is different. The calculation results show that the final shape of the expanded gasbag is pillow shaped, and wrinkles appear at the ends of the long side and in the middle of the short side of the gasbag. The stress at the wrinkles is relatively large, and the stress on the wall of the gasbag with three inlet nozzles is greater than that on the wall of the gasbag with two inlet nozzles. Affected by the changes of flow field in the gasbag and the deformation of the gasbag, the process of the gasbag propelling the bullet is divided into two stages, and there are also two large fluctuation peaks during the change of the acceleration of the bullet. Moreover, the expansion process of gasbag with two inlet nozzles lags behind that of the gasbag with three inlet nozzles, and the maximum acceleration and separation velocity of the bullet are also relatively reduced by 2% and 3%, respectively.

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Numerical modelling and experimental analysis of the passenger side airbag deployment in out-of-position

Cited by 6 publications

References 29 publications

Modeling of Gas-Dynamic Processes in the Elements of Impulse Ejector

Modeling of Gas-Dynamic Processes in the Elements of Impulse Ejector

The modeling and simulation of collision protection system between the driver of non-motor vehicle and car door

Research on the Process of Dispersing the Bullet by a Large-Size Gasbag with Multiple Inlet Nozzles Based on the Fluid–Structure Interaction Method

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