Inlet Definition and 45 Threads

Hello I'm thinking of how to attack this problem. Outside a channel-inlet, wind is passing perpendicular to the opening with a wind speed of 9 m/s and a fan sucks in a certain amount of air into this channel so that the velocity in the channel is 3 m/s. When the outside air is 0 m/s I have no...

What is velocity V in mass flow rate formula, velocity of inlet ,outlet, velocity of rocket speed in relation to freestream?

Hello! My background in propulsion is extremely lackluster with airbreathing engines, so any help is appreciated with the following questions. I understand blade pitch is highly variable for turbofans which operate near the speed of sound, to avoid any localities on the blades reaching the speed...

The answers given are 6.3s for inlet and 3.4s for outlet, which I was able to obtain by dividing 2000/c-u and 2000/c+u c=451.8 i calculated and u=135.5...

Which compressed air inlet to a ring (loop) pipeline would likely be best in terms of least turbulance and best flow (avoiding dead head)? Given: 1) The inlet has to be in the corner of the rectangular loop. 2) Air consumption will be constant and evenly distributed throughout the loop. 3)...

My theory is that the gas inlet end, which is supposed to act as a sound reflector may not be doing a great job because it is plastic and has a hole cut in the centre for the gas inlet port. But by that reasoning, the flames at the end most distant from it (the sound inlet end) should be the...

I am designing an inlet tube and a screened outlet for a cylindrical tank with a top opening hole (which determines the water level). I hope I could receive some suggestions and advice on the approach or some texts/equations I should check out. I am still in the process of learning fluid...

Hello, I'm trying to solve a question, please help me.

I have a working Matlab code solving the 1D convection-diffusion equation to model sensible stratified storage tank by use of Crank-Nicolson scheme (without εeff in the below equation). As indicated by Zurigat et al; there is an additional mixing effect having a hyperbolic decaying form...

Net Inlet Pressure Required (NIPR) is an individual pump characteristic, determined by test, of what pressure energy is needed to fill the pump inlet. How to generate the curve of NIPR or how to know NIPR of the pump if I am a pump manufacturer??

Hello, PF! I’m trying to model a real piping system, which has multiple inlets and one outlet, so I can’t use Bernoulli’s equation. Instead, I’m planning to use the generalized macroscopic energy balances as shown in BSL, which allow for any number of inlets and outlets. However, first I want...

Homework Statement A steam turbine in a small electric power plant is designed to accept 4500 kg of steam at 60 bar and 500oC and exhaust the stem at 10 bar. Part C. In off-peak hours, the power output of the turbine in part a) (100% efficient) is decreased by adjusting a throttling valve...

I'm trying to calculate the air flow decrease of a backward inclined centrifugal fan with inlet bell house with expanded metal installed. The air flow of the fan is 18,400 cfm, 2.6 total static pressure drop, 1540 RPM, 100 deg. air. Orig. equipment did not have this expanded metal on the inlet...

Homework Statement this is a pipe where the water flow from low to high. assuming no friction loss (volume rate are constant at both inlet and outlet) , is the pressure at inlet = pressure at outlet ? p/s : inlet and inlet diameter are same Homework EquationsThe Attempt at a Solution my...

Figure P6.95 provides steady-state test data for a control volume in which two entering streams of air mix to form a single exiting stream. Stray heat transfer and kinetic and potential energy effects are negligible. A hard-to-read photocopy of the data sheet indicates that the pressure of the...

Homework Statement In a jet engine, a flow of air at 1000 K, 200 kPa, and 40 m/s enters a nozzle, where the air exits at 500 m/s and 90 kPa. What is the exit temperature, inlet area, and exit area, assuming no heat loss? Homework Equations min = mout = m where m = mass air flow dE/dt cv = Qcv...

Homework Statement max. Turbine work output rate: 6.0MW Turbine isentropic efficiency: 90% Turbine exit state (isentropic): 40KPa, x=92% Turbine and pump actual process are assumed adiabatic Find turbine inlet state: Pinlet, Tinlet, Sinlet Homework Equations W = ΔH h = hf + xhfg The Attempt...

If there is a "sewer box" (2' x 2' x 2') with a 8" drainage inlet pipe into it and it has a 18" drainage outlet pipe to discharge water entering into the sewer box and the large 2' x 2' grate opening at the top...IF the entire sewer box is inundated with storm water, will the incoming water thru...

I have a container with one inlet and one outlet. I have the area of the inlet, Ai, velocity vi of the air coming in, and mass flow mi (assume a plane with an air inlet to a bay). I don't know anything about the outlet (just that there is one). What I need to do is calculate the size of an extra...

Hi, I am working on investigating an idea I proposed regarding a ramjet that operates in subsonic flow (of a fixed speed) with a convergent intake. That utilizes the pressure immediately behind a standing shock-wave for compression. I have posted a link to my initial report here and I now need...

Folks, I have an application that will require an air inlet port to occasionally be exposed to water (splashing mostly), a simple splash guard will likely not work. Are there any off-the-shelf or simple solutions that anyone can think of that can be used for keeping the water from entering...

Dear All, I am estimating a future problem while still in erection phase for 60 MW steam turbine. I may need your help to estimate a solution. Due to some reason my process heater is not able to generate steam at the desired pressure (other parameters including Temperature and Flow rate...

hello guys, i wanted to calculate inlet pressure of the pump( vacuum pressure). pump operates at 400 bar. pump works by sucking the grease from the inlet port of dia 7mm and delivers it through outlet port of dia 2.8mm. pump used here is piston pump. the force acting on the piston is 400bar...

I am investigating the cause for malfunction of a solenoid water inlet valve (when de-energized, the valve fails to close and instead exhibits cyclic surging of water flow). 4 of the 6 bleed holes are blocked with debris, and I have concluded that this is what caused the valve to malfunction...

Question as the title above ! Could we use the wind turbine to compress the air into engine cylinder as the exhaust compression tubine does ? Thanks all for replying !

Homework Statement Inlet Average Velocity at Inlet = 2.50 m/s Pressure Abs. = 100 Kpa Elev = 2.00 m Inlet tube diameter 12.0 cm Water density 997 kg/m^3 Outlet Average velocity at outlet = 8.00 m/s Elevation = 2.00m a.) Calculate mass flow rate through the pump b.) w/ an outlet pressure of...

I attached the file. I just wanted to clarify something. All i need to find is the density @ inlet&outlet and the diameter at the outlet. The heat loss they have shown has no impact on the values that were asked for right? density can be found by pressure/(RT) where R=gas constant...

Hello, Here are the known's of a chassis: Inlet open area = 17 inches^2 Outlet open area = 30 inches^2 Internal Fans = 270 cfm (3 fans @ 90 cfm each) What is the CFM through the system and what's the equations used to figure this out? I assume that if we had a very small inlet or...

Hello, Here are the knowns: Inlet open area = 17 inches^2 Outlet open area = 30 inches^2 Internal Fans = 270 cfm (3 fans @ 90 cfm each) What is the CFM through the system and what's the equations used to figure this out? Thanks a ton! John

Homework Statement CO2 gas enters a nozzle with an isentropic efficiency of 83% with a low velocity. It exits the nozzle at 110 kpa and 59K and 246m/s. Determine the pressure at the nozzle inlet assuming: Homework Equations -Constant specific heats at room temperature -Variable specific...

i want to model air flow in the inlet manifold using CFD ,how do i predict how flow variations and other parameters affect engine performance ? i know how it affects but how do i show it virtually

Any tips for solving this would be greatly appreciated. Thank you all for your time and help The schematic of the problem is in the attached PDF PROBLEM INFORMATION I’m trying to determine the equations to solve for the conditions at 1, 2, and 3 when they are at a given length in their...

A 10 m high, 5 diameter cylindrical water tank has an inlet at the top and a drain at the bottom. The flow rate out of the tank depends on the pressure at the bottom of the tank via the following: dm/dt = (10^-4)*(P_bot) where P_bot is the absolute pressure in Pascal at the bottom of the tank...

I've been reading about the SR-71 and the J58 engine and I'm confused about what I've read about the inlet spike. The spike would start out extended 3 feet but as speed (Mach) went up it would retract, up to 26 inches when at Mach3.2. This confuses me as I thought you'd always want the...

I am working on a project where we are using ducted fans and just recently we were testing to effect of some bellmouth inlets we made for the ducts. At full throttle the thrust for the fans with no bellmouth inlet was approximately 8.8 lbs and with the inlet the thrust was approximately 10.5...

Hi all - I would like to add a periodic inlet flow rate (Q(t) over an entire period T) as a BC in COMSOL. Does anyone know how to do this in 2D axisymmetric Transient Navier Stokes through COMSOL? I'm aware of the periodic boundary condition option available, but really just don't know how to...

Hi There I'm wokring on a miniature steam car ~0.7kg. I've decided that I would like to investigate the feasibility of propelling the car with a steam jet. So I found a couple of equations that work on the velocity of the exhaust. Equation 1) De Laval nozzel equation for the velocity of the...

(This is a homework/lab assignment but thought it better suits in this category) Hi, This is a scaled model and I am given the pressure tap locations on each rakes. Also given is the pressure data. Inlet distortion formula is given by: Pdist = (Pmax - Pmin)/Pavg Question is to find...

I'm looking for an on-line paper/article/pdf about ducted fans; "Interrupted air flow at fan inlet (subsonic), resulting in fan stall" which I can print out and read. Centrifugal, axial and or mixed-flow fans included. I have not had much luck doing a Google search on my own, perhaps I'm...

suppose air is flowing throught the nozzle with the inlet conditions static pressure = .2 MPa static temperature = 350 K velocty of air at the inlet = 150 m/s speed of sound for ideal gas is given by c = sqrt (k * R * T) suppose if i want to calculate the speed of sound at the inlet...

Hi, i need to know how to calculate the moment of inertia of a centrifugal fan. I searched the forum but didint find any formula... So please people help me

Hello, I'd like to propose you one question. I tried to use my logic but it doesn't work. I have a chamber and i make the vacuum in the interior of it. I have one inlet pipe and two outlet pipes, there is one substance that is coming in, the reaction inside the chamber and the two exits...

I would like to determine what should be the size and number of pipes that are attached tangent to the cone of a tank. I will very much appreciate it that some one comment on how to approach and calculate it. I am trying to create a whirlpool action with an angular velocity of 1 rpm in a...

my laptop fell on its power inlet with the charger plug in it and I think that something might have been broken. whatever is supposed to be at the back of the inlet, or at the end of the charger is what i think broke. My assumption is that it is the ground pin. how should I go about fixing this...

Inlet plenum and gas law calculations? Not sure if this is the best pace to post this question but here goes... I want to get a custom inlet plenum made for my car, there are many already out there but they cost a fortune, but several people have made there own and the construction is fairly...