Experimental study Char‐NO reduction characteristics at elevated pressure

2021 ◽  
Author(s):  
Wenda Zhang ◽  
Yuankai Wang ◽  
Mengshi Chen ◽  
Yijun Zhao ◽  
Shaozeng Sun ◽  
...  
Keyword(s):  
Experimental Study ◽  
No Reduction ◽  
Elevated Pressure ◽  
Reduction Characteristics

scholarly journals Factors Contributing to Increased Blast Overpressure Inside Modern Ballistic Helmets

2020 ◽  
Vol 10 (20) ◽  
pp. 7193
Author(s):  
Maciej Skotak ◽  
Jonathan Salib ◽  
Anthony Misistia ◽  
Arturo Cardenas ◽  
Eren Alay ◽  
...  
Keyword(s):  
Experimental Study ◽  
Shock Tube ◽  
Principle Component Analysis ◽  
Hot Spots ◽  
Shape Factor ◽  
Elevated Pressure ◽  
Focal Points ◽  
Parietal Region ◽  
Blast Overpressure ◽  
Pressure Fields

This study demonstrates the orientation and the "shape factor" have pronounced effects on the development of the localized pressure fields inside of the helmet. We used anatomically accurate headform to evaluate four modern combat helmets under blast loading conditions in the shock tube. The Advanced Combat Helmet (ACH) is used to capture the effect of the orientation on pressure under the helmet. The three modern combat helmets: Enhanced Combat Helmet (ECH), Ops-Core, and Airframe, were tested in frontal orientation to determine the effect of helmet geometry. Using the unhelmeted headform data as a reference, we characterized pressure distribution inside each helmet and identified pressure focal points. The nature of these localized “hot spots” is different than the elevated pressure in the parietal region of the headform under the helmet widely recognized as the under-wash effect also observed in our tests. It is the first experimental study which indicates that the helmet presence increased the pressure experienced by the eyes and the forehead (glabella). Pressure fingerprinting using an array of sensors combined with the application of principle component analysis (PCA) helped elucidate the subtle differences between helmets.

An experimental study of heterogeneous NO reduction by biomass reburning

2015 ◽  
Vol 132 ◽  
pp. 111-117 ◽  
Author(s):  
Yun Shu ◽  
Hongchang Wang ◽  
Jinwei Zhu ◽  
Gang Tian ◽  
Jiayu Huang ◽  
...  
Keyword(s):  
Experimental Study ◽  
No Reduction

scholarly journals Experimental study on drag reduction characteristics through PIV visualization

2019 ◽  
Vol 43 (10) ◽  
pp. 798-804
Author(s):  
Jaesung Kwon ◽  
Jeonghyeon Yang ◽  
Beomsoo Kim ◽  
Sungwoong Choi
Keyword(s):  
Experimental Study ◽  
Drag Reduction ◽  
Reduction Characteristics

Drag Reduction Characteristics Using Aloe Vera Natural Mucilage: An Experimental Study

2011 ◽  
Vol 11 (6) ◽  
pp. 1039-1043 ◽  
Author(s):  
Hayder A. Abdul Bari ◽  
Kumaran Letchmanan ◽  
Rosli Mohd. Yunu
Keyword(s):  
Experimental Study ◽  
Drag Reduction ◽  
Aloe Vera ◽  
Reduction Characteristics

Modeling and experimental study of CO2 corrosion on carbon steel at elevated pressure and temperature

2015 ◽  
Vol 27 ◽  
pp. 1620-1629 ◽  
Author(s):  
Rida Elgaddafi ◽  
Adarsh Naidu ◽  
Ramadan Ahmed ◽  
Subhash Shah ◽  
Shokrollah Hassani ◽  
...  
Keyword(s):  
Experimental Study ◽  
Carbon Steel ◽  
Elevated Pressure ◽  
Co2 Corrosion

Effect of steam addition pathways on NO reduction characteristics in a can-type spray combustor

Fuel ◽  
2010 ◽  
Vol 89 (10) ◽  
pp. 3119-3126 ◽  
Author(s):  
Tomohiko Furuhata ◽  
Tomoya Kawata ◽  
Norio Mizukoshi ◽  
Masataka Arai
Keyword(s):  
No Reduction ◽  
Reduction Characteristics
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