It can be seen that the SFOAE rises rapidly in the bottom region, remains stable in the middle region, and descends in the top region for the TLTR and TLBR; it also descends in the bottom region, rises in the middle region, and remains stable in the top region for the BLBR and BLTR.
It can be seen that the rise of outdoor airflow promotes the mean SFOAE to increase for the TLTR, TLBR, and BLTR and decrease for the BLBR. The increase of outdoor airflow may lead the quantity of indoor reactant A to rise and the residence times of reactant A, reactant B, and the reaction product to descend.
It can be found that the increase of reactant A concentration for outdoor air of ventilation at the inlet causes the mean SFOAE to rise and then descend for the TLTR but to rise for the TLBR and descend for the BLBR and BLTR.
It can be seen that the SFOAE rises for the TLTR, BLBR, and BLTR and descends for the TLBR, as the source intensity of reactant B increases.