Numerical and Experimental Testing of the WLS Series Axial Fans Used for Local Ventilation of Underground Excavations

The testing and inspection of fans is a crucial task at the stages of designing and prototyping as well as in terms of future exploitation. In case of machines performing rotational movement, the scope of research is very broad and concerns strength tests, vibration diagnostics, acoustic test, and flow tests. The article presents the issue of studying vibrations of chosen elements of a fan with special regard to the casing and flow tests of the fan itself. The tests were carried out both on the actual object and numerically.