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近日,由我所材料表面工程研究部孔令艳副研究员参与撰写的国际冷喷涂技术方面的英文专著《Cold-Spray Coatings》由美国 Springer出版社出版发行。孔令艳副研究员撰写了其中第十四章“High temperature oxidation performance of cold spray coatings”, 介绍了金属所在冷喷涂制备涂层的形成机制、结构特征,及其在钛合金表面抗高温氧...
Spray-on memory could enable bendable digital storage
Spray-on memory bendable digital storage
2017/4/27
USB flash drives are already common accessories in offices and college campuses. But thanks to the rise in printable electronics, digital storage devices like these may soon be everywhere – including ...
We are pleased that you are visiting our site for information regarding the thermal spray industry and our membership association.The International Thermal Spray Association is closely interwoven with...
Process Development for Spray Drying of Ber (Ziziphus jujube L.) Juice
Juice Process Developmen
2016/6/2
A study was conducted using Lab Spray Dryer (LU-222 Advanced Model, Twin cyclone) to produce spray-dried Ber powder. Thirty two experiment were conducted keeping five different operating variables of ...
Effects of spray-dried sourdough on flour characteristics and rheological properties of dough
spray-dried sourdough dough rheology flour
2014/2/24
The effect of incorporating different levels of spray-dried sourdough (3, 6, 9, and 15% w/w) on flour characteristics and dough properties of two wheat flours was studied. As the spray-dried sourdough...
基于信誉的延迟容忍网络双重Spray and Wait增强方案
信誉 延迟容忍网络 激励方案 路由
2014/4/4
引入转发证据的概念,设计了节点行为观测协议,提出一种基于信誉的双重Spray and Wait增强方案。通过对原始协议直接传输阶段的建模,使得信誉门限的确定建立在概率计算的基础上。仿真结果表明,在自私节点存在的环境中,与原始方案相比,增强方案能够减少自私行为对网络的危害,提高网络性能。
高压涡旋喷油器喷雾撞壁机理研究(Spray Impingement Characteristic of GDI High-pressure Swirl Injector)
汽油缸内直喷 高压涡旋喷油器 喷雾撞壁 机理
2010/12/29
为了研究直喷式汽油机高压涡旋喷油器喷雾撞壁机理,测量了撞壁喷雾的高度、喷雾半径及喷雾远端速度,分析了不同喷射压力、环境背压、喷嘴到壁面的距离、壁面倾角等因素对撞壁喷雾的影响。随着喷射压力、喷嘴到壁面的距离及壁面倾角的增加,喷雾的贯穿距离增大;环境背压的增大导致喷雾的贯穿距离减小。较高的喷射压力和较低的环境背压增大了撞壁燃油与壁面的接触面积,在壁面上形成的薄膜加速了燃油的蒸发。由经验公式计算得到的撞...
基于JPDF方法的喷雾湍流燃烧数值模拟(Joint Probability Density Function Modeling of Spray and Turbulent Reactive Flow)
喷雾 湍流燃烧 联合概率密度函数
2010/12/29
将速度-标量-频率联合概率密度函数JPDF输运方程方法应用于两相喷雾湍流反应流问题,利用火焰面模型解耦流动和化学反应动力学的耦合关系,建立相应的数值计算模型。采用Monte-Carlo数值计算方法,针对文献中以甲醇为燃料所进行的湍流喷雾燃烧值班火焰这一试验进行了数值模拟,通过与Fluent下的计算结果及试验结果的对比分析,验证了所建模型的准确性。
燃油粘度与环境压力对喷雾碰撞过程的影响(Investigation of the Influences of Droplet Viscosity and Environmental Pressure on the Spray Collision)
内燃机 喷雾模拟 碰撞模型
2010/12/28
O’Rourke碰撞模型仅仅考虑了碰撞拉伸分离以及聚合,而忽略了碰撞反弹、反射分离以及高韦伯数下的碰撞二次破碎过程,在碰撞分区过程中也忽略了燃油物性以及碰撞环境条件的影响,使得预测的碰撞分区临界韦伯数偏低。复合碰撞模型根据相关的实验结果对碰撞分区进行油滴粘度以及碰撞环境压力修正,考虑碰撞反弹、反射分离、拉伸分离以及碰撞二次破碎过程,提高了碰撞分区的预测精度。基于复合碰撞模型,分析了油滴粘度与环境压...
喷涂机器人空间轨迹到关节轨迹的转换方法(Conversion Method from Cartesian Space Trajectory to Joint Trajectory of Spray Painting Robot)
喷涂机器人 空间轨迹 关节轨迹
2010/12/28
根据喷涂机器人离线编程需要和喷涂空间轨迹的特点,提出一种基于Dijkstra算法的喷涂机器人笛卡尔空间轨迹到关节轨迹的转换方法。通过分析工件坐标系和机器人基坐标系的关系,采用辅助特征点三点标定法将工件坐标系内的喷涂空间轨迹转换到机器人坐标系。建立了在机器人逆解中求取最短关节运动行程的优选模型,用赋权有向图表示所有机器人逆解间的行程关系,利用Dijkstra算法求最优的逆解组合。喷涂试验显示,所提出...
锥-射流模式下毛细管静电雾化流场的PIV测量(Investigation on Electrostatic Spray of Capillary in Cone-jet Mode Using PIV)
锥-射流模式下毛细管静电雾化流场的静电雾化 锥-射流 雾滴速度 粒子图像速度场仪
2010/12/28
采用粒子图像速度场仪测量了毛细管微射流静电雾化流场,获得了毛细管静电雾化的典型雾化模式和锥-射流模式下雾场中雾滴的速度矢量图与流线图,分析了雾滴在输运过程中的受力情况和静电电压作用下的速度与流线变化。实验结果表明:在静电力与极化力、重力、流体拖曳力等共同作用下,随着荷电电压的增加,雾场流线分布均匀,雾滴在轴线上速度逐渐增加。在任一电压下,随着射流轴向距离的增加,同一截面上雾滴速度都有所增加,且速度...
The different coating technologies nowadays are more often applied to surface covering of intermediate products and industrial goods [1, 2]. The wear resistant coatings can be also form by the physica...
Criteria of assessment of powders provided to spray by the APS method for new and conventional layers type TBC
Metallic alloys Thin&thick coatings TBC
2009/12/3
Purpose: Verification of up-to-now use of conventional powders, provided to spray by the APS method for layers type TBC and its possible adaptation to layers of new types, which are based on new ceram...
GROWTH AND ANATOMICAL CHARACTERISTICS OF SCOTS PINE (PINUS SYLVESTRIS L.) EXPOSED TO DE-ICING SALT SPRAY
ANATOMICAL CHARACTERISTICS SCOTS PINE DE-ICING SALT SPRAY
2009/11/26
GROWTH AND ANATOMICAL CHARACTERISTICS OF SCOTS PINE (PINUS SYLVESTRIS L.) EXPOSED TO DE-ICING SALT SPRAY。