| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce noise generated caused by interference of a velocity defect region or turbulence formed downstream from a fan moving blade with a fan stationary blade. <P>SOLUTION: A flow straightening means 20 of straightening an air flow by uniformizing its speed distribution in a flow passage section of a duct is installed between the fan moving blade and the fan stationary blade. <P>COPYRIGHT: (C)2013,JPO&INPIT |
