Temperature compensation of laminar fluidic components and systems

An extensive theoretical and experimental study on the temperature compensation of laminar flow fluidic components and systems has been conducted. The methods of constant fluid temperature and power supply scheduling were investigated. These methods use the fluid temperature as the feedback signal to maintain the fluid temperature at a constant level or to regulate the power supply accordingly. The fluid temperature is to be heated to a level which is above the ambient so that cooling is not needed. The method of power supply scheduling can be either an active or a passive system. In the passive system, heating is not needed. The passive power supply conditioner, PPSC, senses the fluid temperature and changes its flow resistance accordingly so as to maintain the ratio supply flow rate/kinematic viscosity ratio at a fairly constant level over the temperature range interested. Both the theoretical and experimental results indicate that the PPSC is an effective device to temperature compensate laminar flow fluidic components and systems operating in air.