TheLambar Reynolds (Re)yana ɗaya daga cikin mahimman sigogi marasa girma a cikin injinan ruwa. Yana taimakawa wajen bayyana alaƙar da ke tsakaninƙarfin inertial da ƙarfin ƙazantaa cikin ruwa mai gudana kuma ana amfani da shi akai-akai don tantance ko kwararar tana gudanalaminar, canjin yanayi, ko rikici.

Don auna kwararar ultrasonic, lambar Reynolds tana da mahimmanci saboda tsarin kwarara yana shafar kai tsayebayanin saurin a cikin bututuTunda na'urar auna kwararar ruwa ta ultrasonic tana auna saurin ruwa a kan hanyar sauti kuma tana amfani da wannan bayanin don tantance matsakaicin saurin kwarara, canje-canje a cikin bayanin saurin na iya yin tasiri ga daidaiton ma'auni.

1. Menene Lambar Reynolds?

Don kwararar ruwa a cikin bututu, ana iya bayyana lambar Reynolds kamar haka:

Re = ρVD / μ

ko kuma:

Re = VD / ν

inda:

• Re= Lambar Reynolds
• ρ= yawan ruwa
• V= matsakaicin saurin kwarara
• D= diamita na bututun ciki
• μ= danko mai ƙarfi
• ν= kinematic viscosity

Lambar Reynolds ba ta da girma.

Gabaɗaya, don kwarara a cikin bututun da'ira:

• Re < kimanin 2,300→ Gudun Laminar
• Re ≈ 2,300–4,000→ Gudun canji
• Re > kimanin 4,000→ Guduwar hayaniya

Waɗannan dabi'u jagorori ne na gabaɗaya maimakon iyakoki masu cikakken iko, saboda ainihin yanayin kwararar ruwa na iya bambanta dangane da yanayin bututu da rikice-rikice.

2. Menene Bambancin Laminar da Ruwa Mai Tashi?

Babban bambanci shine yadda ake rarraba saurin a fadin bututun.

Gudun Laminar

A cikin kwararar laminar, ruwa yana motsawa a cikin yadudduka masu tsari.

Tsarin saurin yawanci ya fi bayyana, tare da:

• Ƙara gudu kusa da bangon bututu
• Babban gudu zuwa tsakiya
• Bayanin saurin parabolic mai iya faɗi wanda za a iya faɗi

Wakilcin da aka sauƙaƙe shine:

Bango → Ƙaramin Gudu → Babban Gudu → Ƙaramin Gudu → Bango

Guduwar Hayaniya

A cikin kwararar ruwa mai rikitarwa, motsin ruwa ya fi rashin daidaituwa.

Ƙananan sauyi da haɗuwa suna sa yanayin saurin ya zama mai laushi idan aka kwatanta da kwararar laminar.

Wannan yana nufin cewa rarrabawar saurin a fadin bututun yana canzawa sosai tare da lambar Reynolds.

3. Me Yasa Wannan Yake Da Muhimmanci Ga Na'urar auna kwararar Ultrasonic?

Mita mai kwarara ta ultrasonic ba ta auna jimillar adadin ruwan da ke ratsa bututun kai tsaye ba.

Madadin haka, yana aunawasaurin ruwasannan ya ƙididdige ƙimar kwararar girma.

A cikin tsari mai sauƙi:

Q = V × A

inda:

• Q= ƙimar kwararar girma
• V= matsakaicin saurin kwarara
• A= yankin giciye na bututu

Kalubalen shine cewa saurin da aka auna a hanyar sauti ta ultrasonic bazai yi daidai da matsakaicin saurin da ke cikin dukkan bututun ba.

Saboda haka, kayan aikin dole ne su yi la'akari da alaƙar da ke tsakanin saurin sauti da aka auna da kuma matsakaicin saurin kwararar da aka saba gani.

Wannan dangantaka tana da tasiri sosai ta hanyar yanayin saurin gudu.

4. Ta Yaya Lambar Reynolds Ke Canza Bayanin Sauri?

Ka yi la'akari da misalai biyu.

Ƙaramin Lambar Reynolds

A ƙasan Re, kwararar na iya zama laminar.

Bayanin saurin yana da ƙarfi sosai:

Gudun tsakiya > Matsakaicin gudu > Gudun kusa da bango

Idan hanyar sautin ultrasonic ta ratsa wani yanki na bututun, saurin da aka auna na iya bambanta sosai da matsakaicin saurin giciye.

Babban Lambar Reynolds

A mafi girman Re, kwararar ruwa tana zama mai rikitarwa.

Haɗawa yakan haifar da yanayin saurin gudu mai sauƙi, kodayake saurin har yanzu yana raguwa zuwa bangon bututu.

Saboda haka, saurin hanyar sauti na iya samun alaƙa daban da matsakaicin saurin bututu.

Wannan shine dalili ɗaya da yasa mitar kwararar ultrasonic ba zai iya ɗauka cewa ƙimar gudu ɗaya da aka auna koyaushe tana daidai da matsakaicin saurin kwarara iri ɗaya ba.

5. Lambar Reynolds da Mita Mai Guduwar Ultrasonic Lokacin Sufuri

Ga na'urar auna kwararar ultrasonic ta lokacin wucewa, na'urar tana auna bambanci tsakanin lokutan wucewar ultrasonic daga sama zuwa ƙasa.

Ana iya sauƙaƙa dangantakar asali kamar haka:

Gudun Gudawa ∝ Bambancin Lokacin Sufuri

Gudun da aka auna yana da alaƙa da ɓangaren saurin tare da hanyar sauti ta ultrasonic.

Duk da haka, ainihin ƙimar kwararar volumetric ya dogara damatsakaicin gudu a duk faɗin sashin bututun.

Saboda haka, kayan aikin dole ne su danganta saurin sautin da aka auna da matsakaicin saurin kwarara.

Wannan dangantaka za ta iya shafar ta hanyar:

• Lambar Reynolds
• Wurin hanyar sauti
• Adadin hanyoyin sauti
• Bayanin kwarara
• Diamita na bututu
• Matsalolin kwararar ruwa

6. Me Yasa Tasirin Ya Fi Muhimmanci A Ƙananan Yawan Gudawa?

Tun daga:

Re = ρVD / μ

Idan saurin kwararar ruwa ya ragu, adadin Reynolds shima yana raguwa.

Misali, tsarin da ke aiki a babban gudun kwarara na iya samun cikakken ci gaba a kwararar ruwa mai cike da rudani, yayin da tsarin da ke aiki a ƙarancin saurin kwarara na iya kusanci tsarin sauyawa ko laminar.

Saboda haka, yanayin saurin zai iya canzawa sosai yayin da saurin kwararar ke canzawa.

Wannan yana nufin cewa dangantakar da ke tsakanin:

Gudun hanyar sauti

kuma

Matsakaicin saurin bututu

yana iya canzawa kuma.

Ga wasu na'urorin auna kwararar ultrasonic, wannan na iya zama muhimmin abin la'akari yayin auna ƙarancin kwararar ruwa ko ruwa mai kauri sosai.

7. Me Yasa Danko Mai Ruwa Yake Da Muhimmanci?

Lambar Reynolds tana da alaƙa da danko:

Re = ρVD / μ

Idan danko ya ƙaru, adadin Reynolds yana raguwa don diamita ɗaya na bututu, yawansa, da kuma saurin kwararar ruwa.

Misali, yi la'akari da ruwaye biyu da ke gudana a daidai lokacin da suke tafiya ta cikin bututu ɗaya:

Ruwa → Ƙananan danko → Mafi Girma Re

Mai mai nauyi → Babban danko → Ƙananan Re

Man mai mai yawa yana iya samun saurin da ya fi bayyana saboda yawan dankonsa.

Saboda haka, na'urar auna kwararar ultrasonic iri ɗaya na iya yin aiki daban-daban yayin auna ruwaye daban-daban, koda kuwa diamita na bututu da saurin kwararar sun yi kama da juna.

8. Me Yasa Tsawon Bututu Mai Daidaito Yake Da Alaƙa Da Lambar Reynolds?

Lambar Reynolds kuma tana taimakawa wajen bayyana dalilin da yasa isasshen tsawon bututun madaidaiciya yake da mahimmanci.

Bayan an yi amfani da gwiwar hannu, bawul, mai rage gudu, ko wani abu makamancin haka, yanayin kwararar ruwa na iya lalacewa.

Gudun ruwa yana buƙatar isasshen nisa don haɓaka zuwa ga ingantaccen bayanin martaba.

Tsarin ci gaba ya dogara da abubuwan da suka haɗa da:

• Lambar Reynolds
• Diamita na bututu
• Tsananin bututu
• Nau'in rikici
• Gudun kwarara

Idan an sanya na'urar auna kwararar ultrasonic kusa da wani tashin hankali a sama, saurin sautin da aka auna na iya yin tasiri sosai ta hanyar bayanin saurin asymmetric ko juyawa.

Wannan zai iya haifar da kurakuran aunawa.

Shi ya sa jagorar shigarwa ta yau da kullun don mitar kwararar ultrasonic na iya ba da shawarar:

Bututun da ke sama madaidaiciya ≥ 10D

Bututun da ke ƙasa madaidaiciya ≥ 5D

inaD shine diamita na bututun da ke ciki.

9. Shin Lambar Reynolds Mai Girma Koyaushe Tana Nufin Ingantacciyar Daidaitawa?

Ba lallai ba ne.

Adadin Reynolds mafi girma gabaɗaya yana nuna ƙarin kwararar ruwa mai rikitarwa, amma daidaiton ma'auni ya dogara da wasu dalilai da yawa.

Waɗannan sun haɗa da:

• Bayanin kwarara
• Shigar da na'urar transducer
• Yanayin bututu
• Tsawon bututun madaidaiciya
• Ingancin sigina
• Tsarin hanyar sauti
• Halayen ruwa
• Daidaita mita

Saboda haka, lambar Reynolds ya kamata a ɗauke ta a matsayin muhimmiyar alama.Sigar yanayin kwarara, maimakon nuna kai tsaye na daidaiton mitar kwarara.

10. Me yasa Mita Mai Gudawa ta Ultrasonic Mai Hanyoyi Da Dama Ba Ya Da Sauƙin Jin Daɗin Bayanin Gudawa?

Wannan yana ɗaya daga cikin mahimman fa'idodin auna kwararar ultrasonic ta hanyoyi da yawa.

Hanya ɗaya ta sautin sauti tana ɗaukar saurin da ke kan iyakacin yankin bututun.

Mita mai kwararar hanyoyi da yawa tana amfani da hanyoyi da yawa na sauti a wurare daban-daban.

A ra'ayi:

Hanya Guda Daya

→ Yana auna gudu a kan hanyar sauti ɗaya

Hanyoyi Da Yawa

→ Samfuran yankuna da yawa na bututun

Kayan aikin zai iya amfani da waɗannan ma'aunai don samun kyakkyawan wakilci na rarrabawar saurin gaba ɗaya.

Saboda haka, ana fifita mita masu kwararar ultrasonic ta hanyoyi da yawa don aikace-aikace inda:

• Tsarin kwararar yana da rikitarwa
• Ana buƙatar cikakken daidaito
• Girman bututun yana da girma
• Matsalolin kwarara suna da wahalar gujewa

Lambar Reynolds tana shafar ma'aunin kwararar ultrasonic saboda tana tasiri ga ma'aunin kwararar ultrasonictsarin kwararar ruwa da kuma yanayin saurin ruwa a cikin bututun.

Alaƙar asali ita ce:

Re = ρVD / μ

Yayin da adadin Reynolds ke canzawa, kwararar na iya canzawa tsakanin tsarin laminar, na canji, da na rikice-rikice. Wannan yana canza rarrabar saurin a fadin bututun kuma saboda haka yana shafar alaƙar da ke tsakanin saurin da aka auna a kan hanyar sauti ta ultrasonic da matsakaicin saurin kwarara na ainihin.

Don auna kwararar ultrasonic mai amfani, ya kamata a yi la'akari da lambar Reynolds tare da:

Gudun kwarara + Danko mai ruwa + Diamita na bututu + Bayanin kwarara + Tsawon bututun madaidaiciya + Tsarin hanyar sauti

Fahimtar lambar Reynolds yana taimaka wa injiniyoyi wajen kimantawa sosaiyanayin kwarara, shigar da firikwensin, rashin tabbas na aunawa, da kuma dacewa da na'urar auna kwararar ultrasonic don takamaiman aikace-aikace.