Darcy-Weisbach tenglamasi nima?

ΔP = f × (L/D) × ρv²/2, where f is the Darcy friction factor, L is pipe length, D is diameter, ρ is density, and v is velocity.

Ishqalanish koeffitsienti qanday hisoblanadi?

Laminar oqim uchun (Re<2300): f = 64/Re. For turbulent flow: solved iteratively using Colebrook-White equation 1/√f = -2log₁₀(ε/3.7D + 2.51/(Re√f)).

Qaysi quvur g'adir-budurligi qiymatini ishlatish kerak?

Po'lat: 0.045mm. Zanglamaydigan po'lat: 0.015mm. Mis/plastik: 0.0015mm. Cho'yan: 0.25mm. Gidravlik shlang: 0.005mm.

Kichik yo'qotishlar qanday ishlaydi?

Minor losses from fittings use K-factors: ΔP_minor = ΣK × ρv²/2. Common K values: 90° elbow = 0.9, tee = 1.8, ball valve = 0.05.

Bosim pasayishining odatiy chegaralari qanday?

Gidravlik tizimlar: bosim liniyalarida odatda 3-5 bar/10m. Suv: 0.1-0.3 bar/100m. Tizimning umumiy ΔP nasosning quvvati doirasida bo'lishi kerak.

Muhandislik uchun bepul vosita

Quvurda Bosim Yo'qotilishi Kalkulyatori

Iterativ Colebrook-White ishqalanish koeffitsienti bilan Darcy-Weisbach tenglamasi. Laminар/turbulent oqim, quvur qo'polligining oldindan belgilangan qiymatlari va armatura qo'shimcha yo'qotishlarini qo'llab-quvvatlaydi.

Darcy-Weisbach Colebrook-White Minor Losses bar / kPa / PSI

Flow Rate (L/min)

Inner Diameter (mm)

Pipe Length (m)

Pipe Material

Kinematik qovushqoqlik (cSt)

Fluid Density (kg/m³)

Minor Loss ΣK (fittings)

Quick presets

Results

Umumiy bosim yo'qotilishi

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Bosim yo'qotilishi (kPa / PSI)

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Ishqalanish yo'qotishlari (faqat quvur)

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Qo'shimcha yo'qotishlar (fitinglar)

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Flow Velocity

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Reynolds soni

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Darcy ishqalanish koeffitsienti f

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Flow Regime

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Darcy-Weisbach tenglamasi

Quvurdagi ishqalanishdan kelib chiqadigan bosim yo'qotilishining asosiy tenglamasi:

f — Darcy ishqalanish koeffitsienti (o'lchamsiz)
L — quvur uzunligi (m)
D — quvurning ichki diametri (m)
ρ — suyuqlik zichligi (kg/m³)
v — o'rtacha oqim tezligi (m/s)

Colebrook-White tenglamasi (turbulent oqim)

Turbulent oqim uchun (Re > 4000) ishqalanish koeffitsienti iteratsiya yo'li bilan aniqlanadi:

Ushbu kalkulyator Moody diagrammasiga mos keladigan aniq natijalar uchun iteratsion Newton-Raphson usulidan (50 iteratsiya) foydalanadi.

Laminar Flow

Re < 2300 (laminar oqim) holati uchun ishqalanish koeffitsienti quyidagicha aniqlanadi:

Minor Losses

Fitinglar, klapanlar, tirsak qo'shimchalar va boshqa elementlar K-koeffitsientlar orqali ifodalangan qo'shimcha bosim yo'qotilishini keltirib chiqaradi:

Fitting	K-factor	Fitting	K-factor
90° tirsak (standart)	0.9	45° elbow	0.4
Tee (through)	0.4	Tee (branch)	1.8
Shib-yopiq (to'liq ochiq) klapan	0.15	To'p klapan (to'liq ochiq)	0.05
Qaytma klapan (aylanma)	2.5	Glob klapan (to'liq ochiq)	10
Quvur kirishi (o'tkir)	0.5	Pipe exit	1.0
To'satdan kengayish	~1.0	To'satdan torayish	~0.5

Quvur g'adir-budurlik qiymatlari

Material	G'adir-budurlik ε (mm)	Notes
Carbon steel	0.045	Yangi tijorat quvuri
Zanglamaydigan po'lat	0.015	Smooth welded
Copper	0.0015	Drawn tubing
Plastik (PE, PVC)	0.0015	Very smooth
Cast iron	0.25	Yangi; eskirganda 1–3 mm bo'lishi mumkin
Hydraulic hose	0.005	Rezina ichki qoplama
Concrete	0.3 – 3.0	Ishlov berishga bog'liq

Amaliy Misol

Misol — Gidravlik bosim liniyasi

Given: Q = 60 L/min, D = 25 mm, L = 10 m, steel pipe (ε = 0.045 mm), oil ν = 32 cSt, ρ = 870 kg/m³

v = 4 × 0.001 / (π × 0.025²) = 2.037 m/s

Re = 2.037 × 0.025 / (32 × 10⁻⁶) = 1,592 → Laminar

f = 64 / 1592 = 0.04020

ΔP = 0.04020 × (10/0.025) × 870 × 2.037² / 2 = 29,045 Pa = 0.290 bar

⚠️ Note: O'tish sohasida (Re 2300–4000) ishqalanish koeffitsienti interpolatsiya qilinadi. Haqiqiy oqim laminar va turbulent rejimlar orasida o'zgarib turishi mumkin. Tizimlarni ushbu sohada ishlashga mo'ljallab loyihalashdan saqlaning.

Quvurda bosim pasayishi kalkulyatori — Darcy-Weisbach | Vibromera

Published by Nikolai Shelkovenko on Fevral 15, 2026 Aprel 5, 2026