Cov nyhuv ntawm ultrasonic
Thaum lub ultrasonic yoj tawm hauv qhov nruab nrab, vim muaj kev sib cuam tshuam ntawm ultrasonic yoj thiab nruab nrab, nruab nrab yauv pauv lub cev thiab tshuaj lom neeg, ua rau muaj kev ntsuas tshuab, thermal, electromagnetic thiab tshuaj ultrasonic teebmeem, suav nrog plaub cov teebmeem hauv qab no:
1. Kev siv tshuab txhua yam
Cov neeg kho tshuab kev txiav txim ntawm ultrasound tuaj yeem txhawb cov kua emulsification, gel liquefaction thiab dispersion khoom. Thaum lub nthwv dej sawv tsim nyob rau hauv ultrasonic cov dej nruab nrab, cov tso me me tshem tawm hauv cov kua tau txhaws ntawm nodes vim kev siv dag zog yuam, tsim cov kev sib txuam sij hawm hauv qhov chaw. Thaum ultrasonic vuam tawm nyob rau hauv cov khoom siv piezoelectric thiab cov khoom siv magnetostrictive, ntxias cov hluav taws xob hluav taws xob thiab cov khoom sib nqus vim kev ua haujlwm ntawm ultrasonic vuam (saib dielectric physics thiab magnetostriction).
2. Cavitation
Thaum ultrasonic vuam ua rau cov kua, ntau qhov npuas me me tuaj yeem tsim. Ib qho laj thawj yog tias qhov kev ntxhov siab me me ib nrab tshwm hauv cov kua los txhawm rau ua lub siab tsis zoo. Kev txo qis hauv lub siab ua rau cov roj thaum xub thawj ua rau hauv cov kua hloov pauv thiab kom dim ntawm cov kua thiab ua npuas me. Lwm qhov laj thawj yog tias qhov muaj zog ntxhov siab" kua muag" cov kua ua rau hauv hollow, uas yog hu ua cavitation. Sab hauv cov kab noj hniav yog kua vapor lossis lwm cov roj foob hauv cov kua, thiab nws yuav txawm tias yog lub tshuab nqus tsev.
Cov npuas me me tsim vim cavitation yuav txuas mus ntxiv, loj hlob los sis tawg nthe nrog kev co ntawm ib puag ncig nruab nrab. Thaum nws tawg, cov kua hluav taws xob nyob ib puag ncig ya mus rau hauv cov npuas, ua rau muaj qhov kub thiab txias, ua haujlwm siab, thiab poob siab ntas. Kev sib txhuam sab hauv nrog cavitation tuaj yeem tsim hluav taws xob tsub, thiab ua rau lub teeb tawm ntawm cov npuas vim los ntawm kev tawm mus. Lub thev naus laus zis ntawm kev kho ultrasonic hauv cov kua feem ntau cuam tshuam nrog cavitation.
3. Cov nyhuv thermal
Vim lub siab lub cev thiab lub siab lub zog ntawm ultrasonic, nws tuaj yeem ua kom pom tseeb thermal siv thaum nqus los ntawm nruab nrab.
4. Kev cuam tshuam tshuaj lom neeg
Cov nyhuv ntawm ultrasound tuaj yeem txhawb lossis leeb qee yam tshuaj lom neeg. Piv txwv li, cov dej ntshiab ntshiab undergoes kev kho mob ultrasonic los tsim hydrogen peroxide; cov dej nitrogen-yaj ua nitrous acid tom qab kho ultrasonic; zas xim aqueous yuav hloov xim lossis thim tom qab kho ultrasonic. Qhov tshwm sim ntawm cov tshwm sim yog ib txwm nrog cavitation. Ultrasound kuj tseem tuaj yeem ua kom qhov hydrolysis, rhuav tshem thiab polymerization ntawm ntau yam tshuaj lom neeg.
Ultrasound tseem muaj cov nyhuv tseem ceeb ntawm cov txheej txheem photochemical thiab electrochemical. Tom qab cov kev daws teeb meem ntawm ntau cov amino acids thiab lwm cov organic muaj txheej txheem yog ultrasonically ua tiav, cov yam ntxwv ntawm lub ntsej muag nqus ploj thiab qhia kom paub kev hnav khaub ncaws dav dav, uas qhia tau tias cavitation tau hloov cov qauv molecular.
