The Era of Stagnation (Russian: Период застоя, Period zastoya, or Эпо́ха засто́я, Epoha zastoya), meaning Stagnation Period, is a term coined by Mikhail Gorbachev in order to describe the negative way in which he viewed the economic, political, and social policies of the Soviet Union that began during the rule of Leonid Brezhnev (1964–1982) and continued under Yuri Andropov (1982–1984) and Konstantin Chernenko (1984–1985). It can sometimes be called the Brezhnevian Stagnation in English.
When two free jets collide at some impingement angle (not necessarily a head on collision), the usual assumption is that in the impingement zone there is a stagnation point around which stream lines are deflected. From this stagnation point, a thin liquid sheet is created, which eventually...
So which should be the best strategy to avoid this hurdle: maybe try and look for a different mathematical object as quantum fields? or rather try and avoid their multiplication in our ways to handle them to obtain predictions? any other ideas? perhaps leave it altogether as not very many...
I am studying the rotary compressor and I have understood that the stagnation pressure and stagnation temperature both increase in the rotor stage (as energy is being added). I also read that in the stator stage the stagnation temperature remains a constant but there is loss of stagnation...
Hello Forum,
I am clear on what the pressure at a point ##P## is on the wall of heigh of a dam at a certain depth ##d## below the water free surface: ## \rho g d+P_atm##. The deeper we go the higher the pressure.
Now let's consider a different scenario: there is initially no water and water...
A body is reentering the Earth's atmosphere at a Mach number of 20. In front of the body is a shock
wave. Opposite the nose of the body, the shock can be seen to be normal to the flow direction. Determine the stagnation pressure and temperature to which the nose is subjected. Assume that the air...
For a real mass-conserved(m dot is constant throughout the system) steady-state mono-substance(same substance throughout) flow , what are the different factors which can cause stagnation pressure and temperature to drop/rise?
Hello All,
I am trying to figure out the solution to a problem I am trying to do for fun. I've been trying this for a while and has annoyed me so any help is greatly appreciated! I attached a picture of the problem/ control area to help...
I was reading this:
http://www.creatis.insa-lyon.fr/~dsarrut/bib/Archive/others/phys/www.mas.ncl.ac.uk/%257Esbrooks/book/nish.mit.edu/2006/Textbook/Nodes/chap06/node29.html
Under the first figure it states "Figure 6.20: The boundary layer at a stagnation point on an airfoil has a constant...
Homework Statement \[/B]
The question I want to ask is how do you relate conditions such as To* and To,1 and To,2, where To,1 and To,2 are the stagnation conditions at the entrance and exit.
This is the problem I was doing.
Standard atmospheric air is drawn steadily through an isentropic...
Hello.
We use a manometer to measure the pressure of an air tunnel. The connection of the manometer has to be changed as sometimes water enters the manometer and contaminates the fluid inside.
I have attached a picture in which I am showing the now and before of the connection. My question is...
I have trouble understanding why Stagnation Pressure equals Total Pressure when we apply Bernoullis theorem to a constriction.
Two different scenarios
Scenario 1.A pipe has pressure p_1 , its flow is velocity v_1 and a diameter a_1 ,it has no restriction along its length.
Total Pressure Tp_1...
I have made a pitot tube that I am using to measure the velocity of air in a pipe. First, I placed the probe into the pipe such that the hole in the probe was parallel to the flow to obtain static pressure. It did this successfully and I proved this using a piezometer. However, I then turned the...
Let \lambda be a linear density of a rope which is moving into a scale at velocity v. The additional force on the scale due to the collision is given as
\frac{d p}{d t} = v\frac{d m}{d t} = \lambda v^2
Where as the stagnation pressure from stopping a column of water in excess of static...
So this is the question I am working on as shown in the attachment.
I got stuck in the part that I highlighted, where they divided the Dynamic temperature by 1000.
WHY ?
Any help will be appreciated,
Thank you.
Homework Statement
Can anyone tell me why, in the figure attached, the pressure in the manometer at 1 is a stagnation pressure?
I understand that you get stagnation pressure at a stagnation point but point one is below the stagnation point, not on the stagnation point. Therefore how can it be...
Hi
I was reading Anderson's Modern Compressible Flow and two of his equations were confusing. I attached the relevant pages on this post.
He defined two conditions or state the sonic and stagnation state used to define flows. The sonic state was defined as an adiabatic transition of the...
First, let me say I am not a engineering student but just a average person trying to get his pilots license and enjoy working with aerospace problems.
My problem is:
“An aircraft is flying at 150 mph. The atomspheric pressure is 14.1 lbs./sq in and the temperature is 50 degrees F. Find...
First, let me say I am not a engineering student but just a average person trying to get his pilots license and enjoy working with aerospace problems.
My problem is:
“An aircraft is flying at 150 mph. The atomspheric pressure is 14.1 lbs./sq in and the temperature is 50 degrees F. Find the...
http://en.wikipedia.org/wiki/Stagnation_temperature
It appears to me that if we have two fluids which are in "heat conduction" contact with each other, then the body with the highest stagnation temperature will transfer heat to the body with the lowest stagnation temperature.
However, it...
Homework Statement
The motion described by the Eulerian velocity, v, is given as v = c(x1e1 - x2e2) is
called stagnation point flow. How long will it take a particle traveling on a streamline to reach the stagnation point?
Homework Equations
The Attempt at a Solution
I really...
Suppose we have a flow of a fluid and let it flow (in x direction) into a stationary wall..the x velocity becomes zero...is this an example of stagnation point?
If not, please cite an example of when that is true.
Using the Fay-Riddell correlation, I can solve for the stagnation point heat transfer but I'm running into a snag. I'm doing this for a thermo-chemical equilibrium assumption. I'm confused with the enthalpy at the wall. I'm assuming a wall that is not adiabatic, but at some wall temp Tw. If I...
a. A very large reservoir of pressurized air feeds a contraction and forms a free jet of air of circular cross section and diameter 60 cm in a laboratory, where the ambient pressure is atmospheric. A Pitot static tube is arranged in the jet and attached to a vertical U-tube manometer containing...
i was just wondering how you'd go about finding the location of stagnation points for an incompressible flow around a cylinder if you know what the stream function is?
Thanks!
Homework Statement
s = 0.6ft upstream @ t=0
s = 0.6 e^(-0.5 t)
where t is in seconds and s is in ft
a) Determine the speed of the particle as a function of time Vpart(t)
b) Determind the speed of the of the fluid as a function of the position along the streamline V=V(s)
c)...
Chomsky says in this video that "Real wages have either stagnated or declined for about 30 years."
A commenter says: "Real wages for working people stagnated in the late 70's, started a steady decline around 1980, and they continued to decline right through the "so-called Clinton Recovery...
Homework Statement
Hi there,
Im currently doing my A2 physics project on Supersonic flight. I am really struggling to understand the concept of Stagnation pressure, it just really hasn't clicked yet. I understand that the fluid 'responds' to pressure waves by building up stagnation pressure and...
Okay. So I am slowly being introduced to some CFD modelling and stagnation pressure keeps coming up as one of the variables.
We are modelling coolers, which of course have a fan(s) that distribute the cool air.
What exactly are we saying if a fan has high or low stag pressure?
I looked...
Hi, does anyone know the definition of "stagnation pressure" at the tip of a slender body
with attached oblique shockwave?
Since the shockwave is completely "attached" to the pointing tip, I think that there is
no flow "behind" the shock at the tip.
So I proceed to think that the...
Homework Statement
Let A be the 4x4 matrix with elements in positions (1,2), (2,3), (3,4), and (4,1) equal to 1, and all other elements equal to zero. Let b = e1 and x0-0. Show that ||rk||2=||r0||2 for k=1,2,3.
Here, rk=Axk-b where xk is the iterate produced by GMRES in iteration k...
Homework Statement
When an airplane is flying 200mph at 5000-ft altitude in a standard atmosphere, the air velocity at a certain point on the wing is 273 mph relative to the airplane. What suction pressure is developed on the wing at that point? What is the pressure at the leading edge ( a...
question regarding stagnation state and process!
stagantion state: it is reference state defined as the thermodynamic state which would exist if the fluid were brought to zero velocity and zero potential.
this is the definition from the textbook fundamentals of gas dynamics b Zucker R.D...
I am currently very confused about how an altimeter works. I understand that stagnation pressure is the pressure of bringing the flow to rest, and that static pressure is the pressure flowing with the fluid (air in this case). What i don't understand is that the static port is used for...
Hi,
Can anyone assist me in the findings of the velocity and temp. profiles for stagnation point flow (m=1) for Varoius values of Pr (.6,1,1.5,5,10). At this moment I am using Matlab's ode45 to solve this problem along with applying the Blasius Eqn (f''' +1/2f*f''=0) and Energy Eqn...