The Study on the Head Loss Calculation of Micro-tube

According the principle of hydraulics, we study on hydraulic power characteristic of micro-tube of two kinds diameter, 1 mm and 2 mm.,integrating with the practice of dripping irrigation. Through the study result we find the diameter has more important influence on hydraulic power characteristic. Under the test condition the main flow state is laminar flow as diameter is 1 mm, another micro-tube has laminar and turbulence state. As we calculate the head loss by the empirical formula, we find the result has biggish error with the fact, so we think those formula don't adapt to the study and application of micro-tube hydraulic.