Experimental investigation of porous material behavior in atmospheric entry conditions

2019 ◽  
Author(s):  
B. Helber
Keyword(s):  
Experimental Investigation ◽  
Porous Material ◽  
Material Behavior ◽  
Atmospheric Entry

Experimental Investigation of Process Specific Material Behavior of Thermoplastic Hybrid Yarn Textiles

2015 ◽  
Vol 18 (3) ◽  
pp. 397-402 ◽  
Author(s):  
Michael Krahl ◽  
Frank Adam ◽  
Teresa Möbius ◽  
Jana Kubitz ◽  
Niels Modler
Keyword(s):  
Experimental Investigation ◽  
Material Behavior ◽  
Hybrid Yarn ◽  
Specific Material

An Experimental Investigation on Transpiration Cooling for Supersonic Vehicle Nose Cone Using Porous Material

2014 ◽  
Vol 541-542 ◽  
pp. 690-694 ◽  
Author(s):  
Lian Jin Zhao ◽  
Jia Lin ◽  
Jian Hua Wang ◽  
Jin Long Peng ◽  
De Jun Qu ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Porous Material ◽  
Supersonic Jet ◽  
Leading Edge ◽  
Injection System ◽  
Aerodynamic Heating ◽  
Hypersonic Vehicles ◽  
Transpiration Cooling ◽  
Cone Model ◽  
Nose Cone

During hypersonic flight or cruise in the near space, the aerodynamic heating causes a very high temperature on the leading edge of hypersonic vehicles. Transpiration cooling has been recognized the most effective cooling technology. This paper presents an experimental investigation on transpiration cooling using liquid water as coolant for a nose cone model of hypersonic vehicles. The nose cone model consists of sintered porous material. The experiments were carried out in the Supersonic Jet Arc-heated Facility (SJAF) of China Academy of Aerospace Aerodynamics (CAAA) in Beijing. The cooling effect in the different regions of the model was analyzed, and the shock wave was exhibited. The pressure variations of the coolant injection system were continuously recorded. The aim of this work is to provide a relatively useful reference for the designers of coolant driving system in practical hypersonic vehicles.

Experimental Investigation of Coke Drum Material Behavior Under Complex Thermal-Mechanical Loading

2011 ◽  
Author(s):  
Jie Chen ◽  
Zihui Xia
Keyword(s):  
Experimental Investigation ◽  
Mechanical Stress ◽  
Mechanical Loading ◽  
Axial Stress ◽  
Circumferential Stress ◽  
Pressure Vessels ◽  
Material Behavior ◽  
Damage Mechanisms ◽  
Delayed Coking ◽  
Stress Cycling

Coke drums are vertical pressure vessels used in the delayed coking process in petroleum refineries and oil sands plants. Significant temperature variation during the delayed coking process causes damage in coke drums in the form of bulging and cracking. In order to better understand the damage mechanisms, an experimental investigation of coke drum material behavior under various thermal-mechanical loading conditions was performed. A thermal-mechanical material testing system is successfully designed and implemented. Six types of various thermal-mechanical cyclic tests were performed: 1. cyclic thermal loading under constant uniaxial stress; 2. in-phase thermal and mechanical stress cycling; 3. out-of-phase thermal and mechanical stress cycling; 4. fully-reversed uniaxial cyclic loading with in-phase thermal cycling; 5. in-phase thermal-axial stress cycling with constant circumferential stress; 6. in-phase thermal-axial stress cycling with mean stress. Some of theses tests are similar to the actual loading scenario experienced by the coke drums. The experimental findings lead to better understanding of the damage mechanisms occurring in coke drums such as bulging.

0705 An Experimental Investigation on Aerodynamic Noise Reduction Using Porous Material

2009 ◽  
Vol 2009 (0) ◽  
pp. 277-278
Author(s):  
Takeshi SUEKI ◽  
Takehisa TAKAISHI ◽  
Masahiro SUZUKI ◽  
Norio ARAI
Keyword(s):  
Experimental Investigation ◽  
Porous Material ◽  
Noise Reduction ◽  
Aerodynamic Noise

Investigation of Warm Prestress for the Case of Small ΔT During a Reactor Loss-of-Coolant Accident

1979 ◽  
Vol 101 (4) ◽  
pp. 298-304 ◽  
Author(s):  
F. J. Loss ◽  
R. A. Gray ◽  
J. R. Hawthorne
Keyword(s):  
Experimental Investigation ◽  
Statistical Analysis ◽  
Vessel Wall ◽  
Crack Extension ◽  
Crack Tip ◽  
Material Behavior ◽  
Virgin Material ◽  
Loss Of Coolant Accident ◽  
Loss Of Coolant ◽  
Failure Temperature

An experimental investigation was conducted to characterize the benefits of warm prestress (WPS) in limiting crack extension in the wall of a nuclear vessel during a LOCA-ECCS. The present research emphasized material behavior under conditions of a small ΔT between the temperature of WPS and the failure temperature as might occur during a LOCA. The results have demonstrated that fracture will not occur during a simultaneous unloading and cooling of the crack-tip region following WPS even though the critical KIc of the virgin material is achieved. Based on a statistical analysis, it is concluded that WPS produces an “effective” elevation in KIc; furthermore, it is suggested that this elevation will limit crack extension in the vessel wall so as to retain the coolant.

scholarly journals Theoretical and experimental investigation of acoustic streaming in a porous material

2002 ◽  
Vol 66 (1) ◽  
Author(s):  
Pietro Poesio ◽  
Gijs Ooms ◽  
Arthur Schraven ◽  
Fred van der Bas
Keyword(s):  
Experimental Investigation ◽  
Porous Material ◽  
Acoustic Streaming
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