as the boiler drum is cylindrical in shape due to low stress concentration and in both end the diameter will be less.so for easy entry into the drum for a man the drum man hole is elliptical in shape.
It's a part of the "transducer" that converts air sounds (large, low pressure) into liquid sounds (low amplitude, high pressure) - it connects the ear drum to the inner ear (a thin section of the skull.
To muffle Zeus's cries as a baby, his guardians, the nymphs, used the sound of a large, clanging bell or a drum. This was to prevent his father, Cronus, from hearing him, as Cronus had a tendency to swallow his offspring to avoid being overthrown. Additionally, they hid Zeus in a cave on Mount Ida in Crete, ensuring his safety and secrecy during his early years.
The 1776-1976 quarter features a special design commemorating the United States Bicentennial. It has a double date of 1776-1976 on the front, with a colonial drummer on the reverse side. The coin also has a dual-dating feature to mark the 200th anniversary of the United States.
"In The Full Moon" by The Black Ghosts features a combination of electronic and synthesized sounds including drum machines, keyboards, and synthesizers. The song has a haunting and atmospheric quality, enhanced by the use of layered vocals and atmospheric effects.
The first cathode ray tube scanning device was invented by the German scientist Karl Ferdinand Braun in 1897. In 1907, the Russian scientist Boris Rosing (who worked with Vladimir Zworykin) used a CRT in the receiver of a television system that at the camera end made use of mirror-drum scanning.
as the boiler drum is cylindrical in shape due to low stress concentration and in both end the diameter will be less.so for easy entry into the drum for a man the drum man hole is elliptical in shape.
because in cylindrical shape stress concentration is less so it can withstand at high pressure also.
The steam drum separated the steam from the water and stream mixture in the boiler drum.
Purpose of the boiler drum is to collect steam from all the various tubes in a boiler, and send it to the turbine to spin the generator
boiler drum diffferential pressure level calculation explained
Generator
Overheating of water wall tubes may cause crack. Boiler will damage due to boiler drum level goes down.
see results in attached link: Philips 3-drum 'Accessable' boiler
This is due to steam seperation the silica remains in the drum water.
see results in attached link: Philips 3-drum 'Accessable' boiler
A drumless boiler is obviously a boiler without a drum. The steam is fed into a header, then into a turbine for making electricity. Quality control of the water used is of extreme importance. Since there is no water level in a drum to maintain, feedwater must be constant with no interruption of any kind. With a drum type, water feed can be interrupted for a very short time. Not so with a drumless type.
Due to pascals law