Numerical Analysis of Transpiration Cooling in Carbon Dioxide Atmosphere at Hypersonic Mach Numbers

Author(s):  
P. S. Kulkarni ◽  
V. N. Kulkarni ◽  
B. R. Ravi ◽  
K. P. J. Reddy

Present days speed of vehicle is concerned in both sub -sonic vehicle( like car, bus and truck etc) super -sonic vehicles (like rockets). Convergent divergent component is the main part which decide the speed of any vehicle. A attempt is made to find the optimal convergent angle (inlet taper angle ) and divergent angle(outlet taper angle [ .) with the help of Numerical analysis through ANSYS 19.0(R3). Deciding parameter for greater thrust is angles i.e.; and [ . So, Convergent divergent nozzles with combustion chamber is designed, modelled and analysed numerical for getting optimal values of convergent and divergent angles . The various angles used are [35,15] [35,20] [35,25] [40,15] [40,20] [40,25] [45,15] [45,20] [45,25]. At these different angle the parameters such as velocity, temperature, pressure and Mach numbers are estimated with the help of steady state fluent with carbon dioxide as inlet to the combustion chamber.


2016 ◽  
Vol 830 ◽  
pp. 134-138 ◽  
Author(s):  
Camila Senna Figueiredo ◽  
Jailton Ferreira do Nascimento ◽  
Rony Oliveira de Sant'ana ◽  
Deborah Cordeiro de Andrade ◽  
Zaniel Souto Dantas Procópio ◽  
...  

Monoethylene glycol (MEG) is being widely applied as thermodynamic inhibitor to avoid formation of natural gas hydrates. High hydrophilicity, low toxicity, low viscosity, low solubility in liquid hydrocarbons and high capacity of dissolving salts are advantageous for the use of MEG in the natural gas production. In addition, MEG recovery can be easily achieved considering its low volatility in relation to water, which makes the process economical and environmentally feasible. The reuse of MEG is being theme of research and phase equilibrium data for the involved species are required. In this work, a experimental procedure to synthetize iron carbonate and, afterwards, determine its solubility in aqueous mixtures of MEG in the presence of carbon dioxide atmosphere have been developed. Furthermore, a series of solubility data has been measured. This work presents a worthy contribution to the description of iron carbonate aqueous solubilities in the presence of MEG and carbon dioxide, regarding the instability of the salt to respect of oxidation. Subsequently, the knowledge of the behavior of the iron carbonate solubilities is useful for the industrial unities of production of natural gas and recovery of MEG.


2010 ◽  
Vol 2010 (0) ◽  
pp. 189-190
Author(s):  
Takehiro Himeno ◽  
Takayuki Tan ◽  
Toshinori Watanabe ◽  
Chihiro Inoue ◽  
Motoaki Utamura ◽  
...  

1996 ◽  
Vol 59 (7) ◽  
pp. 704-710 ◽  
Author(s):  
BON KIMURA ◽  
SHUSAKU KURODA ◽  
MASATADA MURAKAMI ◽  
TATEO FUJII

The growth of Clostridium perfringens inoculated in fish fillets of jack mackerel subsequently packaged under a controlled carbon dioxide gas atmosphere (40% CO2, 60% N2) was investigated at marginal growth (15°C) and stimulative ambient (30°C) handling temperatures. The fish fillets were inoculated with C. perfringens, packaged either with air or the modified controlled carbon dioxide atmosphere and stored at 15°C and 30°C. No increase in the C. perfringens population in the fish was noted regardless of the type of packaging at 15°C in 3 days storage time, when all samples were spoiled. C. perfringens rapidly increased in the abuse temperature (30°C) after a 2- to 4-h lag phase regardless of the package type, but growth was significantly more stimulated under the controlled carbon dioxide gas atmosphere within 6 h of storage time. When fish fillets inoculated with C. perfringens were stored at 5°C for 24 h before being held at 30°C for 6 h, C. perfringens did not grow during the abuse-temperature storage. This suggests a reduction of a health hazard risk by the organism when the distribution temperature of the fish fillets is strictly controlled below 5°C. However, the combination of two temperature-abuse events during distribution and consumer handling may lead to a higher food-poisoning risk by the organism in controlled CO2 modified atmosphere-packaged fish compared to air-packaged fish. Product control of the initial contamination of organisms at low levels during raw fish processing will prevent food poisoning


2016 ◽  
Vol 206 ◽  
pp. 254-258 ◽  
Author(s):  
Sayoko Shironita ◽  
Kazutaka Sato ◽  
Kazuma Yoshitake ◽  
Minoru Umeda

2018 ◽  
Vol 171 ◽  
pp. 164-174 ◽  
Author(s):  
Herberth Arturo Vásquez Haro ◽  
Marcos Sebastião de Paula Gomes ◽  
Luís Glauber Rodrigues

2018 ◽  
Vol 35 (2) ◽  
pp. 395-402
Author(s):  
Deborah C. de Andrade ◽  
Naíra S. de A. Maniçoba ◽  
Rony O. Sant'ana ◽  
Fedra A.V. Ferreira ◽  
Camila S. Figueiredo ◽  
...  

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