Development of a compact pulsed ejector: performance assessment from measured aerodynamic characteristics

Nina Yurchenko, Pavlo Vynogradskyy


The investigation aims at the development of an efficient ejector applicable to the inflation system of automobile airbags.

The work consists in the design of the ejector together with an appropriate testing facility and a measurement complex. The experiment is planned in three parts, measurement of pressure fields, high-speed video recording of the airbag inflation using the designed ejector, and measurement of the entrainment (aspiration) ratio. For that, a few basic elements are built. They are the pneumatic facility with a specially designed high-speed valve as its key element, the data acquisition, and processing system controlled remotely to analyze pressure probe rake signals, and the stand to measure entrainment ratio values depending on the ejector geometry and motive pressure values.

To satisfy the given engineering requirements, supersonic pulse aspirators are developed in various design versions, manufactured, and tested in the Laboratory for Advanced Aerodynamics. Analysis of a number of experimentally obtained results showed their good mutual concordance and a possibility to get the “cold-gas” aspiration ratio, A=3.16 – 1.57, depending on the motive pressure. The new device has obvious advantages compared to the conventional pyrotechnic type: (1) provides their safe operation with big airbags of the autonomous car, (2) eliminates injuries to occupants since aspirated airbags stop inflating on contact with any object within a vehicle.



pulse ejector; airbag inflation; measurement; pressure fields; entrainment (ejection, aspiration) ratio

Full Text:



Breed, David S. (2015), “Steering Wheel Mounted Aspirated Airbag System”, Granted May 26, United States Patent No. US9039038.

Breed, D., Voropaiev, G., Yurchenko, N., Paramonov, Yu. and Koshil, A. (2018), “Airbag inflators including aspirators” , Int. Publication № WO 2018/132420 A1, published 19 July 2018, Internat. Patent No. PCT/US2018/013088.

Breed, D., Zhang, S., Yurchenko, N. and Voropaiev, G. (2018), “Development of an aspirated inflator for preventing out-of-position occupant injuries”, Proc. 14th Int. Symposium on Sophisticated Car Safety Systems, Nov. 26–28, Mannheim, Germany.

David Breed, Shawe Zhang, Nina Yurchenko, Gennadiy Voropaiev, Nataliya Rozumnyuk, Pavlo Vynogradskyy, Kostyantyn Kuzmenko (2018), “Toward autonomous vehicles: basic aerodynamic background for novel airbag inflation system”, Proc. 14th Int. Symp. on Sophisticated Car Safety Systems, Nov. 26–28, Mannheim, Germany.

Tadashi Narabayashi, Yukitaka Yamazaki, Hidetoshi Kobayashi, and Toshihiko Shakouchi (2006), “Flow Analysis for Single and Multi-Nozzle Jet Pump”, JSME Int. J. Series B, Special no on Jets, Wakes and Separated Flows, vol. 49, no. 4, pp. 933–940.

Kyoung-Su Im, Zeng-Chan Zhang, Cook and Grant, O. (2016), “Airbag inflator models in LS-DYNA”, 14th International LS-DYNA Conference, Session: Occupant safety, June 12–14, pp. 1–1 – 1–4.

Kuzmenko, K.M., Yurchenko, N.F., Vynogradskyy, P.M., and Paramonov, Yu.O. (2016), “Optimization of ejector design and operation”. EPJ Web of Conferences, Article Number 02063.

Breed, David S., Yurchenko*, Nina F., Vynogradskyy, Pavlo M., Kuzmenko, Konstantin N. and Paramonov, Yuriy A. (2018), “Advanced aerodynamic system for airbag inflation”. Proc. Int. Conf. on Advances in Automotive Engineering (ICAAE18), August 27 – 31, Incheon, Korea.

Kisil, V.M., Kuzmenko, K.M. and Yurchenko, N.F. (2019), “Universal pneumatic high-speed valve UHSV16-1. Proc. of the Conf. Hydro-Aerodynamics in the Engineering Practice, Kyiv, Ukraine.

Yurchenko, N., Vynogradskyy, P., Pavlovsky, R., Zhdanov, O. (2008), “Aerodynamic Facility with MW-Systems for Flow Control Based on Localized Plasma Generation”, AIAA Paper-2008-3939.

Breauer, Kenneth S. (2004), “Sensors, actuators and algorithms for practical implementations of turbulence boundary layer control”, Brown University, Div. of Engineering, Box D, Providence,, pp. 1–24.

Kasagi, Nobuhide (2005), “Toward smart control of turbulent jet mixing and combustion”, Int. Conf. on Jets, Wakes and Separated Flows, ECJWSF-2005, Toba-shi, Mie, Japan, pp. 1–9.

Yurchenko, N. (2009), “A method of active boundary-layer control over bodies of complex geometry”, (registered in Ukr. Patenting Office 26.10.2009), Patent of Ukraine № 45240.

Yurchenko, N.F. (2013), “Energy-efficient flow control around blunt bodies”, Intl. J. of Advances in Aircraft and Spacecraft Science, vol. 1, no. 1, pp. 15–25.

Breed, David, Yurchenko, Nina, Vynogradskyy, Pavlo, Kuzmenko, Konstantin, Paramonov, Yuriy and Koshil, Andriy (2019), “The Analysis and Experimental Development of Aspirated Airbags for Conventional and Autonomous Vehicles”, Proc. 26th Int.Technical Conf. on the Enhanced Safety of Vehicles (ESV), Eindhoven, Netherlands, June 10–13, 2019, pp. 10.

GOST Style Citations

Copyright (c) 2020 Mechanics and Advanced Technologies

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.


©Mechanics and Advanced Technologies

National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" 

Address: 37, Prospect Peremohy, 03056, Kyiv-56, Ukraine

tel: +380 (44) 204-95-37