化工废液雾化喷嘴的改进

本文分析了废水喷嘴的密封泄漏、旋流器易损坏、喷口经冲刷后影响雾化等问题,通过理论及试验对喷嘴的旋流器、喷口结构、密封型式等进行了改进,新喷嘴达到使用要求。     

压电式喷头的基本原理和应用

在直接制网设备中，大量采用的是压电式喷头。本文介绍了压电式喷头的基本结构和工作原理，讨论了在设计制网机时针对压电式喷头所采用的一些设计方法。     

超音速气流粉碎机喷嘴的结构设计研究

本文应用气体动力学理论，对超音速气流粉碎机喷嘴的流动及结构设计进行了分析，给出了喷嘴气动外形设计的要求和能获得最有效喷射速度的结构设计方法，并给出了喷嘴流态的计算和相应的流动多数计算公式。     

Swirling effects on the performance of the micro-particle acceleration and penetration: parametric studies

A unique biomedical delivery system (biolistics), for micro-sized powder formulation of drugs (typically protein- and/or DNA-based macromolecules) to be effectively and efficiently delivered into human skin or mucosal tissue for the treatment of a scope of diseases, has been proposed. One of the key concerns for designing and evaluating the biolistic system is to warrant that micro-particles are accelerated and penetrated in to the skin with a controllable velocity range and uniform spatial distribution for optimal targeting the cells of interest. In this paper, we numerically interrogate the performance of a prototype biolistic device, designed for a uniform micro-particle acceleration and penetration. Swirling effects on the gas-particle dynamics, the particle acceleration and penetration as well as the device performance are presented and interpreted. Variations of the micro-particle velocity range and spatial distribution with swirl ratios are examined. The ability of the micro-particles penetrating in to a model skin target is demonstrated and discussed.     

超低压等离子喷涂喷嘴设计与喷枪特性

相比大气等离子喷涂（APS）,超低压等离子喷涂（VLPPS）在喷嘴出口处的自由区域对粉末的加热能力较低。目前,大多数超低压等离子喷涂设备采用大功率等离子喷枪,电弧电流高达2500A,以补偿加热能力较低的缺点,然而这样对等离子喷枪及其辅助设备要求较高。根据低压环境下的等离子体特性,设计了内送粉变径阳极等离子喷枪。本研究使...     

校准喷嘴系统的不确定度分析方法

介绍了热线／热膜流速仪的基本原理和用于热线／热膜流速仪校准用的校准喷嘴系统的气体速度确定方法，分析和推导了用不确定度理论全面分析系统不确定度的方法。