通过砂芯漏斗过滤除去飞机除冰液和除冰废水中的固体杂质,采用醋酸钙絮凝法去除飞机除冰液中的增稠剂,然后用硫氰酸汞分光光度法测定飞机除冰液和除冰废水中氯离子的含量。最佳测试条件为:测试100 m L样品,其中醇含量低于10%,絮凝剂加入...通过砂芯漏斗过滤除去飞机除冰液和除冰废水中的固体杂质,采用醋酸钙絮凝法去除飞机除冰液中的增稠剂,然后用硫氰酸汞分光光度法测定飞机除冰液和除冰废水中氯离子的含量。最佳测试条件为:测试100 m L样品,其中醇含量低于10%,絮凝剂加入2 m L,絮凝时间40 min,显色时间40 min,回收率为96.3%~107.5%。该方法简单快捷,准确度和精确度高,可快速准确测试飞机除冰液和除冰废水中的氯离子。展开更多
针对飞机除冰液加热,设计了一种基于GPRS(通用分组无线服务)网络的远程监控系统。它可以实现对设备的实时监控,及时有效地完成飞机地面除冰。该系统由上位机和下位机两部分组成:PLC作为下位机的控制系统,对执行机构进行控制输出,并且由...针对飞机除冰液加热,设计了一种基于GPRS(通用分组无线服务)网络的远程监控系统。它可以实现对设备的实时监控,及时有效地完成飞机地面除冰。该系统由上位机和下位机两部分组成:PLC作为下位机的控制系统,对执行机构进行控制输出,并且由A/D转换模块采集加热设备管道内的物理参数;远程控制中心作为上位机的监控系统,包括两种方式:一是利用数据服务中心作为远程控制中心,二是利用组态软件设计系统的操作界面作为远程控制中心。GPRS DTU(data transfer unit)通信模块通过GPRS网络完成与远程控制中心的无线通信,实现上位机与下位机之间的数据交互。展开更多
为了提高飞机除冰液适航验证能力,根据《AIR 6211 Ice Penetration Test Method for Runways and Taxiways Deicing/Anti-icing Chemicals》标准试验方法,研究分析了温度、冰点、渗透压和分子大小对飞机除冰液渗透性能的影响。试验结果...为了提高飞机除冰液适航验证能力,根据《AIR 6211 Ice Penetration Test Method for Runways and Taxiways Deicing/Anti-icing Chemicals》标准试验方法,研究分析了温度、冰点、渗透压和分子大小对飞机除冰液渗透性能的影响。试验结果表明:随着温度的降低,飞机除冰液对冰的渗透性逐渐减小;在相同温度下,牛顿流体型除冰液的渗透性优于非牛顿流体型除冰液;飞机除冰液的冰点和渗透性无直接关系而与渗透压相关,且渗透压越大,对冰的渗透性越好。展开更多
The influence of glycol,the main composition of the most frequently used aircraft dicer,on the freeze-thaw durability of high performance concrete（HPC）is investigated.Freeze-thaw durability of HPC is tested by accel...The influence of glycol,the main composition of the most frequently used aircraft dicer,on the freeze-thaw durability of high performance concrete（HPC）is investigated.Freeze-thaw durability of HPC is tested by accelerated freeze-thaw test.Four kinds of the solution,i.e.,tap water,3.5% NaCl solution,glycol solutions,and a LBR-A type commercial aircraft deicer are employed.Results show that freeze-thaw durability of HPC exposed to glycol solutions is closely related to the solution concentrations.The failure of HPC exposed to 3.5% glycol solution is similar to that of those exposed to 3.5% NaCl solution,i.e.,serious surface scaling.While the damage of HPC exposed to 12.5%—25% glycol solutions is postponed.Compared with glycol solution,the commercial aircraft deicer has much more negative effects on HPC freeze-thaw durability compared with 3.5% NaCl solution.In the presence of commercial aircraft deicer for HPC subjected to freeze-thaw cycles,the deterioration is mainly due to scaling and spalling.展开更多
文摘通过砂芯漏斗过滤除去飞机除冰液和除冰废水中的固体杂质,采用醋酸钙絮凝法去除飞机除冰液中的增稠剂,然后用硫氰酸汞分光光度法测定飞机除冰液和除冰废水中氯离子的含量。最佳测试条件为:测试100 m L样品,其中醇含量低于10%,絮凝剂加入2 m L,絮凝时间40 min,显色时间40 min,回收率为96.3%~107.5%。该方法简单快捷,准确度和精确度高,可快速准确测试飞机除冰液和除冰废水中的氯离子。
文摘针对飞机除冰液加热,设计了一种基于GPRS(通用分组无线服务)网络的远程监控系统。它可以实现对设备的实时监控,及时有效地完成飞机地面除冰。该系统由上位机和下位机两部分组成:PLC作为下位机的控制系统,对执行机构进行控制输出,并且由A/D转换模块采集加热设备管道内的物理参数;远程控制中心作为上位机的监控系统,包括两种方式:一是利用数据服务中心作为远程控制中心,二是利用组态软件设计系统的操作界面作为远程控制中心。GPRS DTU(data transfer unit)通信模块通过GPRS网络完成与远程控制中心的无线通信,实现上位机与下位机之间的数据交互。
文摘为了提高飞机除冰液适航验证能力,根据《AIR 6211 Ice Penetration Test Method for Runways and Taxiways Deicing/Anti-icing Chemicals》标准试验方法,研究分析了温度、冰点、渗透压和分子大小对飞机除冰液渗透性能的影响。试验结果表明:随着温度的降低,飞机除冰液对冰的渗透性逐渐减小;在相同温度下,牛顿流体型除冰液的渗透性优于非牛顿流体型除冰液;飞机除冰液的冰点和渗透性无直接关系而与渗透压相关,且渗透压越大,对冰的渗透性越好。
基金Supported by the National Basic Research Program of China("973"Program)(2009CB623203)the China Postdoctoral Science Foundation(20070421036)+1 种基金the Natural Science Foundation of Jiangsu Province(BK2005216)the Research Foundation of Nanjing University of Aeronautics and Astronautics(NS2010015)~~
文摘The influence of glycol,the main composition of the most frequently used aircraft dicer,on the freeze-thaw durability of high performance concrete（HPC）is investigated.Freeze-thaw durability of HPC is tested by accelerated freeze-thaw test.Four kinds of the solution,i.e.,tap water,3.5% NaCl solution,glycol solutions,and a LBR-A type commercial aircraft deicer are employed.Results show that freeze-thaw durability of HPC exposed to glycol solutions is closely related to the solution concentrations.The failure of HPC exposed to 3.5% glycol solution is similar to that of those exposed to 3.5% NaCl solution,i.e.,serious surface scaling.While the damage of HPC exposed to 12.5%—25% glycol solutions is postponed.Compared with glycol solution,the commercial aircraft deicer has much more negative effects on HPC freeze-thaw durability compared with 3.5% NaCl solution.In the presence of commercial aircraft deicer for HPC subjected to freeze-thaw cycles,the deterioration is mainly due to scaling and spalling.
