能源與動力工程

能源與動力工程

來源出版物：SCIENCE CHINA Technological Sciences 2015，58（3）： 397-404聯(lián)系郵箱：ZONG Zhi，zongzhichina@163.com

封面介紹：Airbag mandate requires that all vehicles be equipped with airbags to reduce death and injury risk in the event of car accident. The cost and complexity of airbags，however，call for more detailed analysis than any other occupant protection system. Meeting the need for a cost-effective methodology to evaluate an airbag performance in the event of a car crash，Wang et al. has developed a computational technology based on arbitrary Lagrange-Euler coupling method，which is able of simulating the complex gas flows present on both sides of an airbag. Through years of validation with experimental data and application to three car models，they presented here use of the computational tech-nology to simulate the complicated flows of a double-layer airbag with a smaller sub-airbag inside. The sub-airbag is able of dispersing the high-momentum gas flow，thus reducing potential injury risk（see the article by WANG XiJun et al. on page 397）.

Numerical analysis and experimental investigation of wind turbine blades with innovative features: Structural response and characteristics

WANG Xijun，ZONG Zhi，ZHAO Yong，et al.

The passenger side airbags（PAB）are usually larger than the driver airbags. Therefore，the inflator of PAB is more powerful with high mass rate. In this paper，an Arbitrary Lagrangian-Eulerian（ALE）method based computational method is developed to simulate the deployment of a PAB. The tank test is used to test the property of the inflator. Through comparison of numerical and experimental results，the ALE method is validated. Based on a failed airbag test，a smaller sub-airbag is placed inside PAB to disperse the gas flow to directions which are less damaging. By applying dynamic relaxation，the initial mesh corresponding to the experimental terms is obtained. The results indicate that the interior pressure and impact force coincide with the test data，and the method in this paper is capable of capturing airbag deploying process of the PAB module accurately.

arbitrary Lagrangian-eulerian（ALE）method； passenger side airbags（PAB）； airbag simulation； sub-airbag； tank test