scholarly journals Transfer of POCl3 diffusion processes from atmospheric pressure to high throughput low pressure

2018 ◽  
Author(s):  
Sabrina Lohmüller (née Werner) ◽  
Stefan Schmidt ◽  
Elmar Lohmüller ◽  
Alexander Piechulla ◽  
Udo Belledin ◽  
...  
Keyword(s):  
High Throughput ◽  
Atmospheric Pressure ◽  
Diffusion Processes ◽  
Low Pressure

scholarly journals Experimental study on the effect of spray cone angle on the characteristics of horizontal jet spray flame under sub-atmospheric pressure

2020 ◽  
Vol 24 (5 Part A) ◽  
pp. 2941-2952 ◽  
Author(s):  
Kai Xie ◽  
Xingqi Qiu ◽  
Yunjing Cui ◽  
Jianxin Wang
Keyword(s):  
Atmospheric Pressure ◽  
Cone Angle ◽  
Flame Temperature ◽  
Normal Pressure ◽  
Low Pressure ◽  
Dimensionless Temperature ◽  
Thermal Imager ◽  
Spray Cone Angle ◽  
Spray Cone ◽  
Matlab Programming

The burning state of a plateau environment is attracting more and more attention. In this paper, in order to have a deeper scientific understanding of diesel spray combustion and the characteristics of a flame under different spray cone angles in a plateau environment, experiments were carried out in a low pressure chamber. The flame morphology was recorded by a high speed video instrument, and the temperature change was recorded by a thermal imager and thermocouples. The MATLAB programming was used to process the video image of the flame, and the probability of its binarization was calculated. The results indicate that the flame becomes longer and wider under different pressures with the same spray angle. The variation is more pronounced at a smaller spray taper angle. The flame uplifted height characteristic is mainly negatively related to the atmospheric pressure. According to the normalized flame temperature and the dimensionless horizontal projection, the length can be divided into three regions. In the region of buoyancy flame, the dimensionless temperature varies with sub-atmospheric pressure more than with normal pressure. In addition, under different spray cone angle conditions, the law of variation in the normalized flame temperature under sub-atmospheric pressure is exactly opposite to that under normal pressure. This study is of great significance to the scientific research on flames in a low pressure environment, and the design of different fuel nozzles for application in a plateau environment.

Application of cold atmospheric pressure plasmas for high-throughput production of safe-to-consume beetroot juice with improved nutritional quality

2021 ◽  
Vol 336 ◽  
pp. 127635 ◽  
Author(s):  
Anna Dzimitrowicz ◽  
Piotr Jamroz ◽  
Piotr Cyganowski ◽  
Aleksandra Bielawska-Pohl ◽  
Aleksandra Klimczak ◽  
...  
Keyword(s):  
High Throughput ◽  
Atmospheric Pressure ◽  
Nutritional Quality ◽  
Beetroot Juice ◽  
Atmospheric Pressure Plasmas

CO2 Laser Measurements on Shock Fronts

1974 ◽  
Vol 52 (21) ◽  
pp. 2083-2087 ◽  
Author(s):  
A. R. Strilchuk ◽  
A. A. Offenberger
Keyword(s):  
Co2 Laser ◽  
Atmospheric Pressure ◽  
Low Pressure ◽  
Shock Velocity ◽  
Piezoelectric Transducers ◽  
Angle Of Incidence ◽  
Laser Measurements ◽  
Heterodyne Technique ◽  
Shock Fronts ◽  
Good Agreement

CO2 laser measurements on reflectivity of shock fronts in N2, Ar, and CO2 at atmospheric pressure and N2 at low pressure are presented as well as results of shock velocity determination using a heterodyne technique. The measured and expected variation of reflectivity with angle of incidence show good agreement as do velocities compared with those determined using piezoelectric transducers.

Critical Pressure of Spherical Shell Acrylic Windows Under Short-Term Pressure Loading

1969 ◽  
Vol 91 (3) ◽  
pp. 573-584
Author(s):  
J. D. Stachiw
Keyword(s):  
Spherical Shell ◽  
Atmospheric Pressure ◽  
Convex Surface ◽  
Low Pressure ◽  
Full Scale ◽  
Pressure Loading ◽  
Short Term ◽  
Model Scale ◽  
Hydrostatic Loading ◽  
Sector Angle

Model and full scale acrylic windows in the form of spherical shell lenses with parallel convex and concave surfaces have been imploded by loading their convex surface hydro-statically at 650 psi/min rate while their concave surface was exposed to atmospheric pressure. The thickness of the model scale windows varied from 0.250 to 1.200 in. and of the full scale windows from 0.564 to 4.000 in., while the included spherical sector angle of the lens varied from 30 to 180 degrees in thirty degree increments. The low pressure face diameters of the model scale windows varied from 1.423 to 5.500 in., while those of the full scale windows varied from 6.200 to 35.868 in. In addition to critical pressures, displacement of the lens under hydrostatic pressure has been recorded and plotted as functions of pressure. The critical pressures of spherical acrylic windows have been found to be consistently higher than those of conical or flat disc acrylic windows of same thickness and low pressure face diameter subjected to short-term hydrostatic loading.

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