Steam nozzle article

Unit-2 Subject: Applied Thermodynamics: Question traditional bank Steam Nozzle-(Theory) 1 two 3 5 5 6th 7 8 1 Precisely what is steam nozzle? Why it is convergent divergent? What presumptions are followed in examining flow through nozzle? Explain the significance of critical pressure ratio. Precisely what is the stable flow energy equation of nozzle? Make clear its use in calculating the steam velocity at quit? Why the divergent portion of nozzle is essential? Define nozzle efficiency. What is the effect of friction in nozzle Explain the physical concept of essential pressure proportion Explain supersaturated flow through nozzle & Wilson collection? What is the metastable development of heavy steam in nozzle? Explain by making use of H-S plan.

Nozzle Problems(General)

A heavy steam is supplied by 7 tavern and 2750C. The divergent portion can be 50mm extended and neck diameter is usually 5 millimeter. Find the cone angle of divergent portion to ensure that steam may leave the nozzle at 1 bar. Loss inside the nozzle is 12% in divergent part only. Decide velocity and temperature by throat. Vapor at a pressure of 10 tavern and dryness fraction of 0.

98 is discharges through convergent divergent nozzle to a back-pressure a zero. 1 club. The mass flow price is 15 kg/kW they would. If electricity developed is 200 kilowatt. Determine (1) Pressure in throat (2) Number of nozzle required in the event that throat section is rectangle-shaped 5 millimeter x twelve mm. (3) the get across section (with same element ratio in throat) by exit in case the 10% enthalpy loss is divergent part only. A steam nozzle supplied a steam in 15 bar and three hundred and fifty 0 C. and secretions at one particular bar.

The divergent part of nozzle can be 80 logistik long and throat diameter is six mm. Decide the cone angle of divergent part. Assume 12% of total enthalpy is definitely lost in friction in divergent portion. Also identify the velocity and condition of vapor at neck. A convergent-divergent nozzle comes a vapor at 15 bar and 2700C. The divergent section is 3. 2 cm long and throat size is 6 mm. Find the partially cone position of divergent portion in order that steam may well leave the nozzle at 1 . 2 bar. Damage in the nozzle is 15% in divergent portion just. A convergent-divergent nozzle is needed to discharge this individual steam for a price of 2 kg/sec. The nozzle is supplied a steam having a pressure by 7 pub and temperature 180 zero C. The spine pressure is definitely 1 tavern. The frictional resistance between throat and exit is usually 63 kJ/kg. Taking approach velocity 75 m/s and throat pressure is four bar. Estimate (1) The perfect area intended for the neck exit (2) Overallefficiency of nozzle depending on enthalpy drop between the genuine inlet pressure and temp and leave pressure. Sign: C1=75 m/s, η nozzle = (H1-H3-63)/( H1- H3), p2 has so do not need to to compute by optimum discharge state An instinct turbine develops a power of 1000 kilowatt with a steam consumption can be 7. 6th kg/kW hr. The nozzle is CD. The pressure and heat of heavy steam entering in the nozzle can be 18 tavern and 3000C. The 10% enthalpy drop is in divergent portion just.

The size of each nozzle at get out of is 12 mm and exit pressure is 0. 2 bar. Determine (1) Number of nozzle (2) Can range f diameter (3) Length of divergent part if the semi cone angle of divergent part is sixty. A convergent-divergent nozzle is supplied a vapor at several bar and 2700C. The divergent portion is 50mm long and throat diameter is five mm. Get the cone angle of divergent section so that vapor may leave the nozzle at 1 bar. Loss in the nozzle is 10% in divergent portion simply. Steam by a pressure of 10. 8 bar and at 2200C is discharges through concourant divergent nozzle to a back-pressure a 1. 18 bar. The mass flow rate can be 16. forty five kg/kW h. If electricity developed can be 184 kW. Determine (1) Number of nozzle required in the event that throat diameter is 7 mm. (2) Exit diameter and velocity. The 8% enthalpy loss is in divergent part just. A dried out saturated steam at 7 bar broadened in nozzle to 1. eight bar. The flow level is your five kg/sec. The 12% enthalpy loss is within divergent portion only. Decide the cross sectional area at neck and exit. Take n=1. 135.

a couple of

3

some

5

6

7

8

9

Heavy steam Nozzle-Super saturation-Metastable problems

1 In an assembly 5. 2 kg/s of 30 pub and 3500C is supplied to group of half a dozen nozzle in a wheel maintain pressure some bar. (1) Determine the dimension of nozzle in exit if the nozzle is definitely rectangular with aspect percentage 3: 1 ) The expansion is considered to be metastable (2) Degree of under chilling and super saturation. In an installation a few kg/s of steam by 30 pub and 3000C is supplied with a group of six nozzle when in generator chamber pressure is six. 5 tavern. Determine the dimension of rectangular nozzle with aspect ratio of three: 1 . The expansion shall be taken as metastable.

Determine the degree of under cooling down and super saturation. A convergent divergent nozzle receives steam at 7 pub 2000C, broadened isentropically to three bar. Missing the outlet velocity, estimate the leave area of nozzle for mass flow level 0. you kg/sec. (1) when the movement is in equilibrium (2) when ever flow is super over loaded if n=1. 3. Also calculate degree of under air conditioning and degree of supersaturation. Hint: Ans. (1) By Mollier chart and Ans (2) By very saturation concern A dry out saturated vapor at 2 . 8 club expanded in simple concourant nozzle to at least one. 7 bar. Neglecting the inlet speed, the throat area is definitely 3 cm2. Calculate the exit speed and mass flow. (1) When circulation is in equilibrium (2) The moment flow is super saturated if n=1. 3. Hint: Ans. (1) By Mollier chart locate H1, H2 & velocity & meters (2) By super saturation consideration

one particular

Tweet