This paper is the experimental study that present the relation BPT(Blade Passing frequency of Tonality) noise with scroll of Blower unit of HVAC system. Also we found primary position noise of BPT which be affected by the air flow of wheel or fan. Mai...
This paper is the experimental study that present the relation BPT(Blade Passing frequency of Tonality) noise with scroll of Blower unit of HVAC system. Also we found primary position noise of BPT which be affected by the air flow of wheel or fan. Main effected position during wheel operation is identified by bottom of blade even though changing of wheel design and shape and expansion starting point of scroll case. According to this study could be easily approached and improved obviously BPT noise by optimal design of scroll case of HVAC system.