| 摘要 |
<p>The characteristic diameter of a restricted space through which a working media is to be motioned is determined based on the wavelength of the working media prior to the introduction of the working media into the restricted space. The particular formula used to calculate the characteristic diameter is based on a specific goal. Equation 1 is used when the goal is to achieve the maximum possible decrease of the resistance, while equation 2 is used with the objective of maximum possible increase of the resistance, while equation 3 is used when the aim is at maximum possible decrease of the flow turbulence level. (1) d1 = n x .lambda. + 1/4 .lambda., (2) d1 = n x .lambda. + 3/4 .lambda., (3) d1 = n x .lambda., where d1 is the characteristic diameter of the restricted space, n=d/.lambda. is a whole number with the fractional remainder neglected, d is the required characteristic diameter of the restricted space calculated by the required working media flow rate, and .lambda. is the motioned working media wavelength.</p> |
