为得到适用于硝酸乙基铵(Ethylammonium nitrate,EAN)推力器燃烧数值模拟的燃烧机理,以包含EAN蒸发产物硝酸和乙胺的详细化学反应机理为基础,构建了EAN详细燃烧机理,采用生产速率(Rate of production,ROP)分析以及敏感性分析相结合的方...为得到适用于硝酸乙基铵(Ethylammonium nitrate,EAN)推力器燃烧数值模拟的燃烧机理,以包含EAN蒸发产物硝酸和乙胺的详细化学反应机理为基础,构建了EAN详细燃烧机理,采用生产速率(Rate of production,ROP)分析以及敏感性分析相结合的方法对详细机理进行简化,得到了包含82组分291反应的EAN燃烧骨架机理。分别使用两种机理对乙胺着火延迟时间、层流预混火焰中组分分布以及在激波管内反应过程中组分分布,硝酸在激波管内反应过程中组分分布进行了数值模拟,通过比较实验数据和模拟结果,对详细机理和骨架机理进行验证。验证结果表明:骨架机理的模拟结果与实验数据以及详细机理的模拟结果一致,表明了EAN燃烧骨架机理的准确性。得到的骨架机理为EAN推力器燃烧数值模拟提供了反应机理模型。展开更多
The two maize varieties,Yuanzheng 808(astrictive type) and Sidan 19(explanate type),were cultured in pots.There were six treatments which the proportion of NO 3 - N and NH 4 + N were 1∶0 (treatment 1),2∶1(tr...The two maize varieties,Yuanzheng 808(astrictive type) and Sidan 19(explanate type),were cultured in pots.There were six treatments which the proportion of NO 3 - N and NH 4 + N were 1∶0 (treatment 1),2∶1(treatment 2),1∶1(treatment 3),1∶2(treatment 4),0∶1(treatment 5) and CK(no nitrogen) respectively.After emergence of seedings,the samples were picked up per 20 days in the growth period and measured chlorophyll contents,nitrate reductase(NR) activity,the weight of dry matter and single plant seed yield respectively.The result showed that enhanced ammonium nutrition (EAN) may increase chlorophyll content,dry matter weight and single plant seed yield.But there was a difference between varieties.To Yuanzheng 808,treatment 2 was the highest yield in all treatments;but treatment 4 was the highest yield to Sidan 19.展开更多
文摘为得到适用于硝酸乙基铵(Ethylammonium nitrate,EAN)推力器燃烧数值模拟的燃烧机理,以包含EAN蒸发产物硝酸和乙胺的详细化学反应机理为基础,构建了EAN详细燃烧机理,采用生产速率(Rate of production,ROP)分析以及敏感性分析相结合的方法对详细机理进行简化,得到了包含82组分291反应的EAN燃烧骨架机理。分别使用两种机理对乙胺着火延迟时间、层流预混火焰中组分分布以及在激波管内反应过程中组分分布,硝酸在激波管内反应过程中组分分布进行了数值模拟,通过比较实验数据和模拟结果,对详细机理和骨架机理进行验证。验证结果表明:骨架机理的模拟结果与实验数据以及详细机理的模拟结果一致,表明了EAN燃烧骨架机理的准确性。得到的骨架机理为EAN推力器燃烧数值模拟提供了反应机理模型。
基金Supported by Northeast Agricultural U niversity Young Science Found
文摘The two maize varieties,Yuanzheng 808(astrictive type) and Sidan 19(explanate type),were cultured in pots.There were six treatments which the proportion of NO 3 - N and NH 4 + N were 1∶0 (treatment 1),2∶1(treatment 2),1∶1(treatment 3),1∶2(treatment 4),0∶1(treatment 5) and CK(no nitrogen) respectively.After emergence of seedings,the samples were picked up per 20 days in the growth period and measured chlorophyll contents,nitrate reductase(NR) activity,the weight of dry matter and single plant seed yield respectively.The result showed that enhanced ammonium nutrition (EAN) may increase chlorophyll content,dry matter weight and single plant seed yield.But there was a difference between varieties.To Yuanzheng 808,treatment 2 was the highest yield in all treatments;but treatment 4 was the highest yield to Sidan 19.
