电陶瓷加湿器喷杆安装位置和喷嘴朝向对加湿效果的影响问题进行了探讨.以数值模拟为基础通过计算流体力学软件Fluent对送回风管路及喷杆近壁处静压分布进行研究,理论分析加湿的可能性,并就分析结果的准确性加以试验验证.结果表明:(1)喷杆置于回风管中,喷嘴顺流布置和喷嘴逆流布置均可实现加湿目的.喷嘴顺流布置时,随着温度的升高相对湿度由68.7％升高到82％.喷嘴逆流布置时,随着温度的升高相对湿度由61.7％升高到74.6％;(2)喷杆置于送风管路,当加湿器内没有附加压力时,由于近壁处的高压作用在传统加湿器包括电陶瓷加湿器内产生的处于微小正压状态下的蒸汽将无法喷入送风气流,几乎达不到加湿目的.%The humidifying effect affected by installation position of piezoelectric ceramic humidifier spray rod and nozzles direction was discussed.With the numerical simulation,the static pressure distribution in air supply pipeline and air return pipeline and near the wall of spray rod was studied by computational fluid dynamics software Fluent.The possible humidification effect was theoretically analysed under the condition,and the accuracy of analytical results was verified by experiment.Results show that:(1) Spray rod is arranged in the air return tube,and both two arrangements of nozzle--downstream and counterflow--can realize the purpose of humidification.When the arrangement of nozzle is downstream,with temperature increasing,the relative humidity increased from 68.7％ to 82％,and when is counterflow,with temperature increasing,the relative humidity increased from 61.7％ to 74.6％;(2) as long as the spray rod is arranged in the air supply pipeline,when the humidifier do not specifically provide pressure,with the effect of high pressure near wall,the tiny positive pressure steam produced in the traditional humidifier including the piezoelectric ceramic humidifier will can not be sprayed into the air flow and can not humidifying purpose.
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