【摘要】：空化效應(yīng)是超聲在化學(xué)反應(yīng)過程中發(fā)揮作用的主要原因,采用譜分析法衡量空化場強(qiáng)弱,引入標(biāo)準(zhǔn)差評價(jià)空化場的均勻程度,在標(biāo)稱頻率20,k Hz和40,k Hz的清洗槽內(nèi),研究了超聲頻率和槽內(nèi)液位對空化場的影響效果.結(jié)果表明:超聲波換能器使用中存在頻率漂移現(xiàn)象,利用水聽器、示波器結(jié)合MATLAB軟件測量計(jì)算實(shí)際工作頻率分別為23.93,k Hz和42.72,k Hz;低頻時(shí)空化場的平均強(qiáng)度高,但高頻時(shí)空化場的均勻性更好;清洗槽內(nèi)存在諧振液位(30,mm、45,mm、60,mm、75,mm),在這些液位處空化強(qiáng)度和均勻性均較好.
[Abstract]:Cavitation effect is the main reason why ultrasound plays an important role in the process of chemical reaction. Spectral analysis method is used to measure the strength of cavitation field, and standard deviation is introduced to evaluate the uniformity of cavitation field. In the cleaning tank of nominal frequency 20, k Hz and 40, k Hz, The effects of ultrasonic frequency and liquid level in the tank on the cavitation field were studied. The results show that there is frequency drift in the use of ultrasonic transducer. The actual working frequency is 23.93, k Hz and 42.72, k Hz; measured by hydrophone, oscilloscope and MATLAB software, respectively. The average intensity of low frequency space-time field is high, but the uniformity of high frequency space-time field is better, and there is resonance liquid level in cleaning tank (30 mm, 45 mm, 60 mm, 75 mm, mm), and the cavitation intensity and uniformity are better at these liquid levels.
【作者單位】： 天津大學(xué)化工學(xué)院;
【分類號】：O644.3

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