What is a divergent duct?
divergent duct. A duct, or passage, whose cross-sectional area increases in the direction of fluid flow. When fluid flows through a divergent duct at a subsonic rate, its velocity decreases, and its pressure increases.
What is convergent and divergent duct?
A duct that has a decreasing cross section in the direction of fluid flow is convergent, until a minimum area is reached. Thereafter, the cross section increases, or becomes divergent.
What is a converging duct?
convergent duct (convergent nozzle) A duct or nozzle for which the cross-sectional area decreases with downstream distance. For subsonic flow, the velocity increases with distance, whereas for supersonic flow it decreases and the nozzle acts as a diffuser…. …
Why diverging section of Venturi is long?
The divergent cone of the Venturi meter is made longer with a gradual divergence so that the flow separation and the consequent energy loss is minimum. Explanation: The divergent part of a Venturi meter is longer than the convergent part to avoid flow separation.
How does a convergent-divergent nozzle work?
This nozzle configuration is called a convergent-divergent, or CD, nozzle. In a CD nozzle, the hot exhaust leaves the combustion chamber and converges down to the minimum area, or throat, of the nozzle. The throat size is chosen to choke the flow and set the mass flow rate through the system.
What is divergent nozzle?
A de Laval nozzle (or convergent-divergent nozzle, CD nozzle or con-di nozzle) is a tube which is pinched in the middle, making a carefully balanced, asymmetric hourglass shape.
What is the normal range of converging cone of angle of a venturimeter?
around 15-25 degree
The cone angle of converging section is around 15-25 degree and that of diverging section is around 5-8 degree. This cone angle of diverging section is kept small to avoid flow separation. It’s present in almost all flow-related areas. Convergent side 15 to 20 and divergent side 5 to 7 in venturi meter.
What is venturimeter constant?
C is called the venturi meter constant and depends upon the geometric parameter of the given venturi meter. K is called the discharge coefficient. Since the cross-sectional area of the throat is smaller than the cross-sectional area of the inlet section.
What are converging diverging nozzles used for?
Convergent-divergent type of nozzles are mostly used for supersonic flows because it is impossible to create supersonic flows (mach number more than one) in convergent type of nozzle and therefore it restricts us to a limited amount of mass flow through a particular nozzle.
What is the dictionary definition of diverging?
Define diverging. diverging synonyms, diverging pronunciation, diverging translation, English dictionary definition of diverging. v. di·verged , di·verg·ing , di·verg·es v. intr. 1. To go or extend in different directions from a common point; branch out: “All modern species diverged…
Why is the diverging section of a nozzle contoured?
Often, the diverging section is contoured to direct more of the flow rearward to increase efficiency as the components of velocity orthogonal to the axis of the nozzle are ineffective. From: Encyclopedia of Physical Science and Technology (Third Edition), 2003
What causes rays of light to diverge?
A prism causes rays of light to diverge. They were close friends in college, but after graduation, their lives diverged. Recent Examples on the Web Two long anchor routes, the Spine and Ridge trails, serve as main arteries from which connecting paths diverge.
What do the little fan of diverging dotted lines represent?
The little fan of diverging dotted lines of unequal lengths proceeding from (A), may represent its varying offspring. Thus the varieties or modified descendants, proceeding from the common parent (A), will generally go on increasing in number and diverging in character.