Ammonia-air combustion and explosion characteristics at elevated temperature and elevated pressure |
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| Affiliation: | 1. National Engineering Research Center of Chemical Fertilizer Catalyst, School of Chemical Engineering, Fuzhou University, Gongye Road 523, Gulou District, Fuzhou, Fujian 350002, PR China;2. Qingyuan Innovation Laboratory, Quanzhou, Fujian 362801, PR China;1. Chemical Technology Division, Bhabha Atomic Research Centre (BARC), Mumbai 400085, India;2. Homi Bhabha National Institute (HBNI), Mumbai 400094, India;3. Chemical Engineering Division, Bhabha Atomic Research Centre (BARC), Mumbai 400085, India;1. New Energy Materials Research Center, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, People''s Republic of China;2. School of Physics and Electronic Engineering, Hubei University of Arts and Science, Xiangyang, 441053, People''s Republic of China;3. Institute of Advanced Semiconductors & Zhejiang Provincial Key Laboratory of Power Semiconductor Materials and Devices, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou, Zhejiang 311200, People''s Republic of China;4. College of Management & Technology, Zhejiang Technical Institute of Economics, Hangzhou, 310018, China;1. JSC R&D Center at FGC UES, 22/3, Kashirskoye Shosse, Moscow 115201, Russia;2. LLC ITC “DonEnergoMash”, 344006, Rostov-on-Don, Suvorova St., 38a, office 13, Russia;3. LLC RPE “Donskie Technologii”, 346400, Novocherkassk, St. Mikhailovskaya, 164A, Russia;4. Federal State Budgetary Institution of Science “Federal Research Centre The Southern Scientific Centre of The Russian Academy of Sciences”, 344006, Rostov-on-Don, St. Chehova, 41, Russia;1. Guangxi Colleges and Universities Key Laboratory of Environmental-friendly Materials and New Technology for Carbon Neutralization, Guangxi Key Laboratory of Advanced Structural Materials and Carbon Neutralization, School of Materials and Environment, Guangxi Minzu University, Nanning 530105, PR China;2. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, PR China;3. Yazhou Bay Innovation Research Institute, College of Marine Science and Technology, Hainan Tropical Ocean University, Sanya 572022, PR China |
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| Abstract: | Experimental and numerical study on ammonia-air combustion and explosion characteristics at elevated temperature and pressure was conducted. The results revealed that the ammonia-air flame of different equivalence ratios is quite smooth at elevated temperature and pressure. The laminar burning velocity (LBV) reaches the peak of 0.073 m/s at Ф = 1.1 and increases as increasing initial premix temperature and decreasing initial premix pressure. Maximum explosion overpressure (MEO) and maximum pressure rise rate (MPRR) reach the peak of 0.43 MPa and 0.13 MPa/ms respectively at Ф = 1.1. The theoretical MEO is significantly higher than the experimental results due to heat loss, and the minimum heat loss occurs at Ф = 1.1. MEO, MPRR and heat loss increase with increasing initial premix pressure, and MEO and heat loss decrease with increasing initial premix temperature, while MPRR increases. Okafor mechanism has the best LBV prediction performance among seven mechanisms. And the main elementary reactions affecting LBV are H + O2=O + OH and HNO + H H2+NO. |
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| Keywords: | Elevated temperature Elevated pressure Ammonia energy Laminar burning velocity Explosion overpressure |
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