Apr 29 10:30
15 days ago
19 viewers *
English term
Türkiye
Certified Translator - English/Turkish
Native in: Turkish 
Works in: English to Turkish, Turkish to English
Terfi hattı başlangıcındaki darbe miktarı
English to Turkish
Other
Advertising / Public Relations
H :Terfi hattı başlangıcındaki darbe miktarı,(m)
a : Dalga yayılma hızı, selerite, (m/sn).
V : Borudaki su hızı(m/sn). g
a : Dalga yayılma hızı, selerite, (m/sn).
V : Borudaki su hızı(m/sn). g
Proposed translations
(Turkish)
| 3 | Impulse volume at the start of force main |
Türkü Naz Altınay
|
References
| pulse, wave, period |
Tomasso
|
Proposed translations
14 days
Türkü Naz Altınay
United Kingdom
United Kingdom
Native in English
&
Turkish
United Kingdom
MCIL and CIL, Chartered Linguist
Native in: Turkish , English
Works in: Turkish to English, English to Turkish
Impulse volume at the start of force main
Teknik çevirilerde kullanılan "darbe" terimi için "impulse" kullanılabilir, miktar kısmında "volume", terfi hattı için de "force main" kullanılabilir.
Reference comments
3 days 17 hrs
Reference:
pulse, wave, period
https://www.texasgateway.org/resource/132-wave-properties-sp... ""Learning Objectives
By the end of this section, you will be able to do the following:
Define amplitude, frequency, period, wavelength, and velocity of a wave
Relate wave frequency, period, wavelength, and velocity
Solve problems involving wave properties"" (may not be relevant)
also place to look...https://www.physicsforums.com/threads/propagation-speed-of-m...
https://www.muellerwaterproducts.com/news/what-water-hammer-...
Maximum Head Pressure.
Next, determine the maximum head pressure due to water hammer, in excess of the initial head or initial pressure energy, in feet (h).
urn:x-wiley:01498029:media:opfl1530:opfl1530-math-0002 (2)
where
a = estimated or derived water hammer wave velocity from equation 1
V = initial pipeline velocity (ft/sec)
g = acceleration due to gravity (ft/sec 2 )
Optimal Time to Close Valve. You have calculated the excess pressure due to water hammer (in feet; this is also considered the change in kinetic energy) and the critical time in which the pressure wave will travel from the valve to the end point of the pipeline and return (in seconds). You can now use equation 3 to determine the desired or adjusted time required to close the valve in order to not exceed a satisfactory net pressure in the pipeline.
urn:x-wiley:01498029:media:opfl1530:opfl1530-math-0003 (3)
where
H = net excess head due to water hammer at the valve in feet (this value is chosen as the “not to exceed” additive head pressure)
s = critical closing time (sec), from equation 1
h = water hammer pressure above initial pressure (ft), from equation 2
t = adjusted valve-closing time (sec)
By the end of this section, you will be able to do the following:
Define amplitude, frequency, period, wavelength, and velocity of a wave
Relate wave frequency, period, wavelength, and velocity
Solve problems involving wave properties"" (may not be relevant)
also place to look...https://www.physicsforums.com/threads/propagation-speed-of-m...
https://www.muellerwaterproducts.com/news/what-water-hammer-...
Maximum Head Pressure.
Next, determine the maximum head pressure due to water hammer, in excess of the initial head or initial pressure energy, in feet (h).
urn:x-wiley:01498029:media:opfl1530:opfl1530-math-0002 (2)
where
a = estimated or derived water hammer wave velocity from equation 1
V = initial pipeline velocity (ft/sec)
g = acceleration due to gravity (ft/sec 2 )
Optimal Time to Close Valve. You have calculated the excess pressure due to water hammer (in feet; this is also considered the change in kinetic energy) and the critical time in which the pressure wave will travel from the valve to the end point of the pipeline and return (in seconds). You can now use equation 3 to determine the desired or adjusted time required to close the valve in order to not exceed a satisfactory net pressure in the pipeline.
urn:x-wiley:01498029:media:opfl1530:opfl1530-math-0003 (3)
where
H = net excess head due to water hammer at the valve in feet (this value is chosen as the “not to exceed” additive head pressure)
s = critical closing time (sec), from equation 1
h = water hammer pressure above initial pressure (ft), from equation 2
t = adjusted valve-closing time (sec)
Discussion
When the valve is closed slowly compared to the transit time for a pressure wave to travel the length of the pipe, the elasticity can be neglected, and the phenomenon can be described in terms of inertance or rigid column theory:
𝐹
=
𝑚
𝑎
=
𝑃
𝐴
=
𝜌
𝐿
𝐴
𝑑
𝑣
𝑑
𝑡
.
{\displaystyle F=ma=PA=\rho LA{dv \over dt}.}
Assuming constant deceleration of the water column (dv/dt = v/t), this gives
𝑃
=
𝜌
𝐿
𝑣
/
𝑡
.
{\displaystyle P=\rho Lv/t.}
where:
F = force [N],
m = mass of the fluid column [kg],
a = acceleration [m/s2],
P = pressure [Pa],
A = pipe cross-section [m2],
ρ = fluid density [kg/m3],
L = pipe length [m],
v = flow velocity [m/s],
t = valve closure time [s].
English goes into more details...https://en.wikipedia.org/wiki/Water_hammer