Flow field and vibration analysis of improved air purifier in enclosed cabinet

Table 1. First six-order natural frequencies of the prototype air purifier
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Table 1. First six-order natural frequencies of the prototype air purifier
阶数
1 2 3 4 5 6
固有频率/Hz 54.1 55.9 133.0 488.2 1 277.6 1 329.4

Table 2. Excitation spectrum of the prototype air purifier
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Table 2. Excitation spectrum of the prototype air purifier
频率/Hz
25 50 75 100 125 150 175 200 225 250 275
激励力/N 5 160 5 80 5 40 5 20 5 5 5

Table 3. Comparison on flow rates of the prototype and improved air purifier

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Table 3. Comparison on flow rates of the prototype and improved air purifier

	原型空气净化器		改进型空气净化器
	最大流速/(m·s⁻¹)	平均流速/(m·s⁻¹)	最大流速/(m·s⁻¹)	平均流速/(m·s⁻¹)
叶轮部件区域	7.02	2.18	6.64	1.55
滤芯部件区域	5.88	1.40	4.06	0.78

Table 4. Natural frequencies of the improved air purifier
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Table 4. Natural frequencies of the improved air purifier
阶数
1 2 3 4 5 6
固有频率/$ \mathrm{H}\mathrm{z} $ 253.7 257.4 316.8 733.8 774.3 780.7

Table 5. Total vibration energy of the prototype and improved air purifier
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Table 5. Total vibration energy of the prototype and improved air purifier
振动总能量
计算值/dB 实测值/dB 误差/dB
原型空气净化器 119.0 115.7 3.3
改进型空气净化器 109.7 106.7 3.0
差值 9.3 9.0 0.3

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Chenyu ZHANG, Shuai MENG, Yong CHEN, Chidong CHE. Flow field and vibration analysis of improved air purifier in enclosed cabinet[J]. Chinese Journal of Ship Research, 2021, 16(4): 173

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