If the height of the core partition is lower than the tip of the nozzle of the core burner, the core partition is not capable of exerting {TAIL ~ the effect} to prevent {HEAD ~ the airflow} 
If the height of the core partition is lower than the tip of the nozzle of the core burner , the core partition is not capable of exerting { TAIL ~ the effect } to prevent { HEAD ~ the airflow }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD