公开(公告)号：US07409875B1

公开(公告)日：2008-08-12

申请号：US11862793

申请日：2007-09-27

申请人： Kurt A. Polzin ,  Valentin Korman ,  Thomas E. Markusic ,  Boris Johann Stanojev

发明人： Kurt A. Polzin ,  Valentin Korman ,  Thomas E. Markusic ,  Boris Johann Stanojev

IPC分类号： G01F1/708

CPC分类号： G01F1/7084 ,  G01F1/7086

摘要： A flowing electrically-conductive fluid is controlled between an upstream and downstream location thereof to insure that a convection timescale of the flowing fluid is less than a thermal diffusion timescale of the flowing fluid. First and second nodes of a current-carrying circuit are coupled to the fluid at the upstream location. A current pulse is applied to the current-carrying circuit so that the current pulse travels through the flowing fluid to thereby generate a thermal feature therein at the upstream location. The thermal feature is convected to the downstream location where it is monitored to detect a peak associated with the thermal feature so-convected. The velocity of the fluid flow is determined using a time-of-flight analysis.

摘要翻译： 流动的导电流体在其上游和下游位置之间被控制，以确保流动流体的对流时间尺度小于流动流体的热扩散时间尺度。 载流电路的第一和第二节点在上游位置耦合到流体。 电流脉冲施加到载流电路，使得电流脉冲通过流动流体，从而在上游位置处产生热特征。 热特征被对流到下游位置，在该位置被监测以检测与被热对流的热特征相关联的峰。 使用飞行时间分析确定流体流速。