Download - Irradiation Sample Transfer Line Snubbing Section Behavior Greg Padilla and Keane Nishimoto
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Irradiation Sample Transfer Line Snubbing Section BehaviorGreg Padilla and Keane Nishimoto
![Page 2: Irradiation Sample Transfer Line Snubbing Section Behavior Greg Padilla and Keane Nishimoto](https://reader034.vdocuments.mx/reader034/viewer/2022051516/56649d4d5503460f94a2c7eb/html5/thumbnails/2.jpg)
Introduction
BackgroundThe MIT reactor and Transfer Line
MotivationSafety measure in case of Transfer
Line failure Desired Findings
Model to help design snubbing section
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Procedure
Apparatus Experimental Procedure Data Processing
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ApparatusSmoothSectionW/ Bend
First Sensor
Snubbing Section
PressureSensor
SecondSensor
TransferCylinder
Transfer line
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Experimental Procedure
Calibration of pressure sensor Drops at 4 heights for each of 3
different masses Data Recorded
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Data Processing
Calibration data Capsule velocity calculated Pressure calculations
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Typical Data from Drop Test
Data taken form container mass = 0.7kg
Height = 42” inches
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Data
Trigger Trace from first sensor
Trace from second sensor Trace from Pressure
sensor
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Theoretical Analysis
Model of the falling capsuleTransfer LineSnubbing Section
MATLAB Simulation
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Transfer Line Model
The capsule is a falling object
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Snubbing Section Model
Force due to gravity Force due to pressure
Ideal Gas Law – PV=mRTNavier Stokes
Used to determine the mass of air left
2h
hdxdP
12μ1
ρAm 3
cair
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MATLAB simulation
ODE 23 solver State Variables
Position and velocity of capsuleMass of air in snubbing section
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Results
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Smooth Section Model
Velocity is independent of Mass Velocity is a Function of Height Velocity = 1.46*Height + 2.18 Ave. Error of 16%
Velocity as a Function of Mass
3
3.5
4
4.5
5
5.5
300 500 700 900
Mass [g]
Vel
ocity
[m/s
ec]
height=1.07 m
height=0.72 m
height=1.73 m
Exp. Data and Therical models
2
2.5
3
3.5
4
4.5
5
0.5 1 1.5 2
Height [m]
Vel
ocity
[m/s
ec]
Exp. data
Gravity Model
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Snubbing Section Model
Initial Conditions: Mass = 0.7kg Velocity = 4.0m/s Temperature = 298K
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Recommendations
Temp = 574K Velocity = 5.0m/s Snubbing Length
=1.5m Max P=1.81kPa Snubbing Length
=1.0m Max P=1.86kPa
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Final
Temp = 574K Velocity = 5.0m/s Snubbing Length
=1.3m Max P=1.83kPa