Attenuation of shock waves propagating in polyurethane foams

被引:63
作者
Kitagawa, K. [1 ]
Takayama, K.
Yasuhara, M.
机构
[1] Aichi Inst Technol, Dept Mech Engn, Toyota, Aichi 4700392, Japan
[2] Tohoku Univ, Biomed Engn Res Org, Sendai, Miyagi 9858577, Japan
关键词
shock propagation in foam; shock/foam interaction; shock wave attenuation; shock tube; sonic boom control;
D O I
10.1007/s00193-006-0042-1
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
Shock wave attenuation in polyurethane foams is investigated experimentally and numerically. This study is a part of research project regarding shock propagation in polyurethane foams with high-porosities phi(g) = 0.951 similar to 0.977 and low densities of rho(c) = 27.6 similar to 55.8 kg/m(3). Sixty Millimeter long cylindrical foams with various cell numbers and foam insertion condition were installed in a horizontal shock tube of 50 mm i.d. and 5.4 mm in length. Results of pressure measurements in air/foam combination are compared with CFD simulation solving the one-dimensional Euler equations. In the case of a foam B fixed on shock tube wall, pressures at the shock tube end wall increases relatively slowly comparing to non-fixed foam, free to move and a foam A fixed on shock tube wall. This implies that elastic inertia hardly contributes to pressure build up. Pressures behind a foam C fixed on shock tube wall decrease indicating that shock wave is degenerated into compression wave. Dimensionless impulse and attenuation factor decrease as the initial cell number increases. The momentum loss varies depending on cell structure and cell number.
引用
收藏
页码:437 / 445
页数:9
相关论文
共 15 条
[1]  
Baer M. R., 1992, Shock Waves, V2, P121, DOI 10.1007/BF01415901
[2]  
Bear J., 1988, DYNAMICS FLUIDS PORO
[3]   Shock waves attenuation by granular filters [J].
Britan, A ;
Ben-Dor, G ;
Igra, O ;
Shapiro, H .
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, 2001, 27 (04) :617-634
[4]  
COLLINS RE, 1961, FLOW FLUIDS THROUGH
[5]  
Dullien F, 1979, POROUS MEDIA FLUID T, DOI DOI 10.1016/0300-9467(81)80049-4
[6]  
Gibson LJ, 1988, CELLULAR SOLIDS STRU
[7]   Experimental investigation of the interaction of shock waves with textiles [J].
Hattingh, TS ;
Skews, BW .
SHOCK WAVES, 2001, 11 (02) :115-123
[8]   Drag difference between steady and shocked gas flows passing through a porous body [J].
Kitagawa, K ;
Jyonouchi, T ;
Yasuhara, M .
SHOCK WAVES, 2001, 11 (02) :133-139
[9]  
KITAGAWA K, 2004, P 24 INT S SHOCK WAV, V2, P1247
[10]  
LEVY A, 1992, SHOCK WAVES, V8, P127