A nozzle is a device designed to control the direction or characteristics of a fluid flow (especially to increase velocity) as it exits (or enter) an enclosed chamber or pipe via orifice. A numerical study has been carried out to analyse the performance and flow characteristics of the convergent-divergent nozzle under various operating pressure ratio and with different nozzle profiles, also to determine the location and strength of the normal shock in the divergent portion of the nozzle .Various flow parameters across the normal shock had been obtained by using gas table.
Keywords: Mach number, Sub-sonic, Super-sonic, Sonic, Compressible flow, Throat.
1. Introduction
A de Laval nozzle (or convergent-divergent nozzle, CD nozzle or con-di nozzle) is a tube that is pinched in the middle, making an hourglass-shape. It is used as a
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Components/Materials used
Air Compressor
Plumbing setup consisting of CI pipes of various sizes
Convergent nozzle which is interchangeable, profiled and polished brass nozzle
Convergent-Divergent nozzle
Pressure dial gauges
Chock valves
Screws, nuts, bolts, washer
Teflon tape
4. Methodology
Let us consider a convergent divergent nozzle with inlet and outlet section specified in the diagram as 1 and 5 respectively. In the diagram shown below section 2 represent the throat i.e, the maximum mass flow rate, Section 3 and 4 represents the flow conditions before and after the shock respectively.
Figure 3 C-D Nozzle
5. Working of Nozzle system
The compressed air from the compressor is passed through the inlet of the nozzle where the compressed air converges, then it is passed through the throat where the air compresses because of small cross-sectional area here the pressure decreases, then it is passed through the diverging part of the nozzle where the velocity increases.
6. Observation table of C-D nozzle
7. Calculations
Sample calculation for CD nozzle- first reading (P2=4.9 bar)
T=32=305 K
P =1.013 bar
P2= 4.9
Question3: Experiment 3 The unknown acid sample was 1 • Monoprotic Acid Trails Initial NaOH solution (mL) final NaOH solution (mL) The volume of NaOH to titrate the acid (mL) Amount of Unknown Acid sample 1 (g) The moles of the Unknown Acid (mol) Molar mass of the Unknown Acid (g/mol) A 3.38 28.31 24.93 0.150 0.0026 57.69 B 0.18 29.32 29.14 0.175 0.0029
2. Add 8cm³ of sodium carbonate to each tube using a measuring cylinder. 3. Measure out the strontium nitrate for each boiling tube and add it (boiling tube 1 contains 1cm³, test tube 2 contains 2cm³ and so on). 4.
The power spectral densities ($PSD$) of the gas jet centerline $C^*(t)$ for the tests in Tab.\ref{Table} were computed via $FFT$, and collected in Fig.\ref{Spectra}. For plotting purposes, the frequency domain $f_j$ is limited to $f_j=150 Hz$, and the $PSD$ in each graph is normalized with respect to the maximum $PSD$ detected within the three tests. Regardless of the stand-off distance $\hat{Z}$, for $\hat{Y}=0$ the response of the jet to the membrane motion is the superimposition of a harmonic response $f_h$ and a higher frequency $f_f$, which is not affected by the membrane motion. Noteworthy, $f_f$ scales with the standoff distance and leads to a constant Strouhal number $St_Z= f_f Z/U_j\approx 0.08$, not far from the $St_Z=0.12$ \cite{Vshape}
The video we chose to illustrate Country music is The Winding Stream: The Carters, the Cashes, and the course of Country Music. The film is accessible to students and can be easily found on Netflix. The UTSA library does not have the film on hand however you can make a request and they will get it for you. In this film the life of a Virginia family known as the Carter Family, is shown and how they made an impact on music by creating a folk band.
Feras Kaid Chem 2415-43 TA: Rio Assessment 1 Conclusion In this lab, there were 4 different distillations that were performed each with the same end goal to separate the two different organic compounds, cyclohexane and toluene. We used the boiling points of the two compounds to separate them using the following 4 techniques: microscale simple distillation, miniscale simple distillation, miniscale fractional packed distillation, and miniscale fractional unpacked distillation. The three different miniscale distillations were used to predict the accuracy of the distillation by comparing them to one other. The most accurate of the three distillations is the miniscale fractional packed distillation because this type uses a Vigreux column instead
Pop Rocks and soda have a very interesting chemical reaction with each other. Soda is a very pressurized drink that has carbon dioxide in it. Carbon dioxide is a pressurized chemical. When it is shaken, it fizzes, and causes pressure, and overflows releasing the carbon dioxide. It is similar to the Pop Rocks.
The topic of research is, “how fast does an Alka-Seltzer tablet make gas?”. In the experiment, the scientists will be measuring the chemical reaction rates that occur, when 1 Alka-Seltzer tablet is placed in a specific temperature of water. The independent variable during the experiment will be the temperature of the water (degrees Celsius). The dependent variable during the experiment will be, the rate in which gas is produced (in seconds). The constants of the experiment, will be the amount of water used and the Alka Selter compound.
11) After you have prepared the dilutions, clean the outsides of the cuvettes with a paper towel. 12) Place the blank tube (tube 0) in the spectrophotometer. Since distilled water has no color it will not absorb any light so the absorbance number would be zero and this done to test the absorbance scale on the Spectrophotometer for the purpose of having it calibrated correctly. 13) Set the spectrometer to a wavelength of 530 nanometers. 14) Place the cuvettes (numbers 1-6) with the appropriate substance and record it’s reading in the data table.
The basic principle of the most vehicles on either in land, air or water is mixing fuel and air. Cars, trucks, jet engines, and motorcycles mixed fuel and air to become power and burn in cylinders inside the engine. The amount of fuel and air that enters the engine varies from time to time, depending on the time running, speed, and other factors. However, modern vehicles use and electronic devices to control the amount of air and fuel that enters the system called fuel injection Carburetor was invented by an Italian, Luigi de Cristoris on 1876. After a few years, Karl Benz made his own carburettor when he developed the first automobile run by internal combustion.
There are multiple points both at 43°C and at 72°C which indicates that liquid was collected at these temperatures. Based on this information, it would appear that two different liquids were present in solution and that one liquid has a boiling point of approximately 43°C and that the other has a boiling point of approximately 72°C. The literature value boiling point for DCM in is reported to be about 40°C and it is about 80°C for cyclohexane. Based on the graph, DCM was collected from 4 ml to 22 ml, thus 18 ml of DCM was collected.
Another vertical differentiation is the service on board. Most low-cost airlines try to maintain cost-effectiveness or lower their cost by not offering additional service to the passengers such as extra foods and drinks. However, Nok Air does provide a box of Auntie Anne bread, and beverages to the passengers during onboarding, while Air Asia provides nothing. This is considered to be the vertical price discrimination because all passengers agree that having some foods and drinks during on boarding is better, but there is no guarantee that food served by Nok Air is the best choice for them.
The tuning fork was struck on the rubber stopper and was held above the water column. The tube’s length was adjusted until the volume of the sound increased and measured the length of
IV. Data and observations Mass of beaker (g) 174.01 Mass of beaker + NaOH pellets (g) 174.54 Mass of NaOH pellets 0.53 TRIAL 1 TRIAL 2 Mass of potassium acid phtalate (KHP) (g) 0.15 0.15 final buret reading (ml) 30.75
so when you multiply the 2.9 by 2 it gives you 5.8 cm3 which was my result. As the voltage increases the volume of hydrogen and oxygen increases. The standard deviation when I used 9 volts for hydrogen it was 0.7 + 0.23= 0.93 and 0.7-0.23= 0.47 so the range of values is between 0.47 cm3 to 0.93 cm3. When I used 9 volts for oxygen it was 0.3+0.12=0.42 and 0.3-0.12=0.18 so the range of values is between 0.18 cm3 to 0.42 cm3.
The 250 mL beaker was rinsed well with the distilled water. The titration procedure above was repeated 2 more times with fresh potassium acid