• Convergent Nozzle Flow Velocity and Area Equation and Calculator Nozzles are used in steam and gas turbines, in rocket motors, in jet engines and in many other applications. Two types of nozzle are considered: the ‘convergent nozzle’, where the flow is subsonic; and the ‘convergent divergent nozzle’, for supersonic flow.
  • When steam f lows through a nozzles expansion process take place. As the steam expand there is drop in pressure and enthalpy of steam and consequently its velocity and specific volume both increases .The smalls section of the nozzle is known as throat. Types of nozzles: There are two types: 1-Convergent nozzle. (fig.(1)) 2-Convergent-Divergent ...
  • Dec 12, 2016 · Reduction in exit velocity: The kinetic energy of the steam increases at the expense of its pressure energy in the steam nozzle. Some kinetic energy gets lost to overcome the friction in nozzle. Therefore, exit velocity of steam decreases due to nozzle friction.
Sep 15, 2020 · 1. Steam enters a nozzle at 400°C and 800 kPa with a velocity of 10 m/s, and leaves at 300°C and 200 kPa while losing heat at a rate of 25 kW. For an inlet area of 800 cm?, determine the velocity and the volume flow rate of the steam at the nozzle exit. Determine the following: a. Velocity at the exit (m/s) b.
Mar 31, 2016 · A convergent-divergent nozzle is required to discharge he steam at a rate of 2 kg/sec. The nozzle is supplied a steam with a pressure at 7 bar and temp 180 0 C. The back pressure is 1 bar. The frictional resistance between throat and exit is 63 kJ/kg. Taking approach velocity 75 m/s and throat pressure is 4 bar.
Equation 1 – Valve Trim Exit Velocity Head . Valve trim exit velocity head is calculated using the following equation: KE = ½ • ρ • V 2 . Where: • KE = Trim exit velocity head (Pascals); • ρ = Fluid density at the trim exit in kilograms per cubic meter (kg/m3); • V = Fluid velocity at the trim exit in meters per second (m/s).
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  • Exit velocity of steam nozzle

    After Me =1 is reached at the nozzle exit for =, the condition of choked flow occurs and the velocity throughout the nozzle cannot change with further decreases in. This is due to the fact that pressure changes downstream of the exit cannot travel upstream to cause changes in the flow conditions.For example a de Laval nozzle using hot air at a pressure of 1,000 psi (6.9 MPa or 68 atm), temperature of 1470 K, would have a pressure of 540 psi (3.7 MPa or 37 atm), temperature of 1269 K at the throat, and 15 psi (0.1 MPa or 1 atm), temperature of 502 K at the nozzle exit. The expansion ratio, nozzle cross sectional area at exit divided by ... Fig. 1. The nozzle is designed to produce a jet at high velocity by expanding the motive fluid from inlet to suction pressure. The design of the nozzle varies depending upon expansion ratio, state of fluid and type of the Ejector. Fig. 2 shows a converging nozzle for liquids and low-pressure gases, a spray nozzle for Oct 15, 2016 · Nozzle is a duct by flowing through which the velocity of a fluid increases at the expense of pressure drop. if the fluid is steam, then the nozzle is called as Steam nozzle. The flow of steam through nozzles may be takenas adiabatic expansion. The steam possessesa very high velocity at the end of the expansion, and the enthalpy decreases as ... Determine (a) the exit velocity of the steam and (b) the mass flow rate of the steam at the nozzle entrance if the nozzle exit area is 0.001 m2. Get 5.198 exercise solution 5–199 The turbocharger of an internal combustion engine consists of a turbine and a compressor. Spray nozzle scrubbers - water are sprayed with high pressure through nozzles to produce the droplets in the air; Typical Scrubber Data. Cleaning efficiency: 70% of fine dust and 80% of coarse dirt; Air velocity through the washer: 2 - 3 m/s; Air flow pressure drop resistance: 50 - 140 N/m 2; Water pressure before nozzles: 100 - 170 kN/m 2 Steam leaves the nozzle at 1.4 MPa with a velocity of 275 m/s. Heat losses from the nozzle per unit mass of the steam are estimated to be 2.8 kJ/kg. Determine (a) The inlet velocity of the steam (b) The exit temperature of the steam 2.8 kJ/kg 1.8 MPa 400 o C 0.02 m 2 1.4 MPa 275 m/s 5 kg/s The DSH water pipe is inserted in the steam line upto the centre line & mounted on the piping nozzle. The water injection happens at the centre of steam line in the direction of steam flow, where the velocity is maximum. This ensures a good atomisation of water. It is recommended to have a steam velocity of more than 8m/s for proper mixing of ... Homework Statement Steam, at 15 bar and 280oC, enters a nozzle with an initial velocity of 125 m/s. The steam enthalpy at the exit section is 2800 kJ/kg and the heat loss is 25 kJ/kg. What is the exit steam velocity?. Homework Equations 1)Qin - Qout = m [h2-h1+((c22-c12))/2] 2)h = Pv + u... Steam enters a nozzle at 400°c and 800kpa with a velocity of 10m/s, and leaves at 300°c and 200kpa while losing heat at a rate of 25kw. for an inlet area of 800cm2, determine: i. the velocity of the steam at the nozzle exit the volume flow rate of the steam at the nozzle exit Oct 24, 2019 · Effect of nozzle exit position (NXP) on ejector performance. The NXP off-design studies were carried out based on the ejector assembly constraints. The nozzle exit positions were varied in the steps of 1 cm both in upstream (0 to − 3 cm) and downstream (0–3 cm) directions. All other operating parameters were kept constant during the test. Mar 07, 2017 · As gases flow through a nozzle, due to converging cross section, the velocity increases. However we are not supplying energy or removing energy from the system. So the kinetic energy to increase the velocity has to come from the gas itself. Explanation: When the flow is subsonic, air in nozzle expands isoentropically and hence exit temperature and exit pressure depends on the amount of expansion. Sanfoundry Global Education & Learning Series – Steam and Gas Turbines. Convergent Nozzle Flow Velocity and Area Equation and Calculator. Nozzles are used in steam and gas turbines, in rocket motors, in jet engines and in many other applications. Two types of nozzle are considered: the 'convergent nozzle', where the flow is subsonic; and the 'convergent divergent nozzle', for supersonic flow.When super heated steam is expanded isentropically, it starts condensing at its meet with dry saturated line. But in nozzles, the velocity of steam is high and hence the time available is very less (about 0.001 sec). So, the condensation phenomenon does not start at point '2' for a flow of point 1 to point 5.A simple device was constructed for determining a value for the average combustion gas velocity at the exit plane of a high-velocity oxyfuel gun. This device was used to measure the velocities of a standard factory-made barrel nozzle and a specially designed de Laval nozzle as a function of the fuel/oxygen ratio and the total mass flow rate. The Mach number of the de Laval nozzle was 1.42. The ... Problem # 1 (Nozzle) Nitrogen gas flows into a convergent nozzle at 200 kPa, 400 K and very low velocity. It flows out of the nozzle at 100 kPa, 330 K. If the nozzle is insulated, find the exit velocity. V i = 0. Adiabatic nozzle . The SSSF equation: V e 2 /2 = (h i – h e) = C p (T i – T e) = {g R u /M(g-1)} (T i – T e) b) Determine the throat area ,exit area and exit velocity for a steam nozzle to pass 0.2 kg/s when the inlet conditions are 12 bar and 2500c and the final pressure is 2 bar .Assume that expansion is isentropic and inlet velocity is negligible. Take n=1.3 for super heated steam. 4. Steam-at 0.6 mpa, 200c, enters an insulated nozzle with a velocity of 50 m/s. it leaves at a pressure of 0.15 mpa and a velocity of 600 m/s. determine the final temperature if the steam is superheated in the final state, and the quality if it is saturated. also repeat the problem if the exit pressure is: 0.14, 0.13, 0.12, 0.11, 0.10 mpa. The effect of considering friction losses in steam nozzle for the same pressure ratio leads to. A. increase in exit velocity from the nozzle. B. decrease in exit velocity from the nozzle. C. no change in exit velocity from the nozzle. D. increase or decrease depending upon the exit quality of steam. Answer: Option B In impulse turbines, the steam expands through the nozzle, where most of the pressure potential energy is converted to kinetic energy. The high-velocity steam from fixed nozzles impacts the blades, changes its direction, which in turn applies a force. The resulting impulse drives the blades forward, causing the rotor to turn. The main feature ... Apr 16, 2010 · Argon gas enters an adiabatic nozzle steadily at 800 C and 700 kPa with a low velocity, and exits at a pressure of 120 kPa. The highest possible velocity of argon gas at the nozzle exit is about 10 to 15%. The velocity of steam will be then Where, k is the co-efficient which allows for friction loss. It is also known as nozzle efficiency. Velocity of Steam at Nozzle Exit: 3.5 Mass of steam discharged through nozzle: The velocities encountered in most familiar applications are well A below the sonic velocity, and thus it is natural that we visualize a nozzle as B a converging duct. However, the highest velocity we can achieve by a con- P 0, T0 verging nozzle is the sonic velocity, which occurs at the exit of the nozzle. The convergent parts of the nozzle are sharp and frictionless. In the divergent parts, the friction loss may be taken as 0.15 of the isentropic enthalpy drop. If the steam floe rate is 1 kg/s and the initial velocity of steam is negligible, find the minimum area of the nozzle. If the exit diameter of nozzle is 25 mm, find the number of nozzles.implying that the equation governing the nozzle exit velocity (v 1) is. The kinetic steam impinging upon a turbine blade, redirected as show in Fig. 3, results in a net tangential force F on the turbine blade. Using the usual laws governing force and applying vector algebra, an expression for the power generated (ignoring friction) is: [2] At point 1 the steam is in superheated region and at point 2 steam is in wet region. When steam is expanded isentropically from 1–2 ,It is expected that phase change occurs at point x .But practically because of very small length of nozzle , great... A.The velocity of jet of steam entering a de-Laval turbine is 500 mis. The nozzles are inclined at 20° to the direction of blades. The blade speed is 200 mis and the exit angle of the moving blades is 25°.
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The steam expands in a nozzle with an efficiency of 90%. The blade speed is 250 m/s and the nozzles are inclined at 20oto the plane of the wheel. The blade angle a t the exit of the moving blade is 30o. Neglecting friction losses in the moving blade, determine.

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  • PROBLEM # 11.2 The steam from a nozzle of a single impulse turbine discharges with a velocity of 600 m/s and at 20 o to the plane of the wheel. The blade wheel rotates at 3000 rpm and the mean blade radius is 590 mm. The axial velocity of the steam at exit from the blade is 164 m/s and the blades are symmetrical. Calculate:
  • For an inlet area of $800 \mathrm{cm}^{2}$ determine the velocity and the volume flow rate of the steam at the nozzle exit. Problem 31 A nozzle receives $0.1 \mathrm{kg} / \mathrm{s}$ of steam at $1 \mathrm{MPa}$ and $400^{\circ} \mathrm{C}$ with negligible kinetic energy.

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At the inlet, pressure is 15 bar, temperature 700 K, velocity 100 m/s, and cross-sectional area 0.1 m^2. At the exit, pressure is1 bar and temperature is 330 K. Determine exit velocity and exit cross-sectional area. Air can be assumed as an ideal gas. Adiabatic steam nozzle. Water steam at 600 kPa and 200oC enters aninsulated (adiabatic) nozzle ...

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  • Steam at 0.6 MPa and 300oC steadily enters a nozzle whose inlet area is 0.07 m2. The velocity of the steam at the inlet is 5 m/s. Steam leaves the nozzle at 250oC and 0.2 MPa.
  • PROBLEM # 11.2 The steam from a nozzle of a single impulse turbine discharges with a velocity of 600 m/s and at 20 o to the plane of the wheel. The blade wheel rotates at 3000 rpm and the mean blade radius is 590 mm. The axial velocity of the steam at exit from the blade is 164 m/s and the blades are symmetrical. Calculate:

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In most feed nozzle designs, the steam flow for atomization of the hydrocarbon is set by the fixed orifices. Unless you are throttling the steam supply, the steam flow rate is not adjustable without modifying the nozzle internals.

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It can be seen that the specific enthalpy of the steam has dropped in passing through the nozzle from 2 576.25 to 2 489.30 kJ/kg, that is, a heat drop of 86.95 kJ/kg. This seems to contradict the adiabatic principle, which stipulates that no energy is removed from the process.

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A.The velocity of jet of steam entering a de-Laval turbine is 500 mis. The nozzles are inclined at 20° to the direction of blades. The blade speed is 200 mis and the exit angle of the moving blades is 25°.

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about 10 to 15%. The velocity of steam will be then Where, k is the co-efficient which allows for friction loss. It is also known as nozzle efficiency. Velocity of Steam at Nozzle Exit: 3.5 Mass of steam discharged through nozzle:

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At the inlet, pressure is 15 bar, temperature 700 K, velocity 100 m/s, and cross-sectional area 0.1 m^2. At the exit, pressure is1 bar and temperature is 330 K. Determine exit velocity and exit cross-sectional area. Air can be assumed as an ideal gas. Adiabatic steam nozzle. Water steam at 600 kPa and 200oC enters aninsulated (adiabatic) nozzle ...

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PROBLEM # 11.2 The steam from a nozzle of a single impulse turbine discharges with a velocity of 600 m/s and at 20 o to the plane of the wheel. The blade wheel rotates at 3000 rpm and the mean blade radius is 590 mm. The axial velocity of the steam at exit from the blade is 164 m/s and the blades are symmetrical. Calculate:

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