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非导电超硬磨料砂轮电火花放电修整技术（Electrical Discharge Truing/Dressing Technology of Non-electrical Super-abrasive Grinding Wheels）
砂轮 非导电 超硬磨料
2010/12/29
提出借助辅助放电材料对非导电超硬磨料砂轮进行放电修整的方法，阐述了放电蚀除结合剂实现非导电超硬磨料砂轮修锐的基本原理。通过观察修锐前后树脂结合剂金刚石砂轮表面的微观形貌，分析了峰值电流和电流脉宽对砂轮修锐质量的影响。结果表明，利用辅助放电材料实现非导电砂轮放电修锐是可行的，峰值电流是影响脉冲放电能量和修整区域温度场的重要因素；适合树脂结合剂金刚石砂轮修锐的放电峰值电流不高于3 A。
水泵转速变化对进出水流道水力损失的影响（Influence of Rotational Speed of Pumps on Hydraulic Losses in Suction Boxes and Discharge Passages）
水泵 转速 水力损失 进出水流道
2009/8/11
在比较各种进出水流道水力损失研究方法的基础上，运用计算流体动力学方法数值模拟了4种水泵装置内部流动，研究水泵转速变化对进出水流道水力损失的影响。数值计算结果表明，由于水泵装置中进水流道内部流动受水泵叶轮旋转引起的水流预旋的影响，因而小于无泵单独运行时的水力损失。水泵转速变化后，在相同流量下，进水流道的水力损失基本不变。水泵导叶出口水流条件和剩余环量影响出水流道的水力特性，水力损失随流量变化的关系非...
Determination of Emitter Spacing Based on the Amount of Water Applied and Trickle Discharge Rates
Emitter Spacing Water Applied Trickle Discharge Rates
2009/1/23
This study was conducted with the objectives of determining effect of trickle discharge rates and amount of irrigation water applied on water distribution in the soil profile and to estimate the emitt...
Effect of Different Water Amounts and Discharge Rates on Moisture Distribution in Perlite and Pumice by Trickle Irrigation
Different Water Amounts Discharge Rates Moisture Distribution Perlite Pumice Trickle Irrigation
2009/1/15
This study was undertaken to determine the effect of different particle size and discharge rates and total irrigation water on moisture distribution in perlite and pumice. Four different discharge rat...