高速气流对人体鼻腔温度场影响的数值研究

Numerical study on intranasal air temperature at high speed flow

针对人体正常鼻腔及病变鼻腔在高速气流下的流场温度进行研究,揭示高速气流下鼻腔温度调节特性。建立反映鼻腔壁面温度特征的分区鼻腔物理模型,根据模型特点提出数学方程并应用有限体积法进行离散推导,使用数值方法对物理模型进行仿真计算,探讨三种主要高速流量工况下正常鼻腔及病变鼻腔流场的温度场特性。仿真结果显示,三种高速气流下经人体正常鼻腔温度调节后气体平均温度为29℃～30.5℃,经病变鼻腔温度调节后气体平均温度为26℃～29℃。得到结论：高速气流下正常鼻腔和病变鼻腔的温度调节功能明显下降;通过实施入口条件的温度补偿,可以提高鼻腔温度调节后气体的温度。

The research of intranasal air temperature with high flow can reveal temperature characteristics in the normal and diseased human nasal cavity. A physical nasal model,used for reflecting the nasal wall temperature characteristics is established. Flow equations is put forward and discretized on the control volume by finite volume method. Numerical simulation is used to analyze temperature distributions in the model. The field of temperature distributions is discussed in the normal and diseased nasal cavity with three types of high flow. The results show the intranasal air temperature is between 29 ℃ and 30. 5 ℃ in the normal nasal cavity,and between 26 ℃ and 29 ℃ in the diseased nasal cavity at high speed flow. The conclusion can be obtained that function of temperature regulation would be reduced evidently in the diseased nasal cavity and the intranasal air temperature can be compensated by enhancing the inlet air temperature.