Influence of Thermal Wires Spacing on Fluidic Gyroscope

2013 ◽  
Vol 753-755 ◽  
pp. 2700-2703
Author(s):  
Jing Bo Chen ◽  
Lin Hua Piao ◽  
Pan Pan Yang
Keyword(s):  
Finite Element ◽  
Angular Velocity ◽  
Output Voltage ◽  
Sensitive Element ◽  
Model Building ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Equation Solving ◽  
Element Simulation ◽  
Two Dimensional Model

In this paper, research the influence on spacing thermal wires in the sensitive element of fluidic gyroscope. Using ANSYS-FLOTRAN CFD software, the finite element simulation is conducted by a series of procedures, such as two-dimensional model building of fluidic gyroscope, meshing, loads applying and equation solving. The two-dimensional airflow distributions of different distances between two thermal wires in sensitive element of fluidic gyroscope are calculated. The results show that, when the angular velocity ωi<20o/s, and the distance between two thermal wires d=4mm, the structure can reduce the velocity of vortex in sensitive element, and increase the thermal wires variation, thus it will increase bridge output voltage, and improve the sensitivity of fluidic gyroscope.

Finite Element Analysis of Nozzle Position on Nozzle Array Fluidic Gyroscope Performance

2013 ◽  
Vol 753-755 ◽  
pp. 2713-2716
Author(s):  
Jing Bo Chen ◽  
Lin Hua Piao ◽  
Zhi Wei Fan
Keyword(s):  
Finite Element ◽  
Sensitive Element ◽  
Model Building ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Element Analysis ◽  
Equation Solving ◽  
Element Simulation ◽  
Nozzle Position ◽  
Convergence Trend

In this paper, research the influence on position of vice nozzle in the sensitive element of nozzle array fluidic gyroscope. Using ANSYS-FLOTRAN CFD software, the finite element simulation is conducted by a series of procedures, such as two-dimensional model building of fluidic gyroscope, meshing, loads applying and equation solving. The two dimensional airflow distributions of different distances between vice nozzle and main nozzle in sensitive element of nozzle array fluidic gyroscope are calculated. The results show that, the distance between vice nozzle and main nozzle l=1.1mm, velocity of airflow at the outlet VSUM=0.71455m/s, and it is 47.6% of the velocity at the inlet, which increases by 1.75% than the distance l=0.5mm. The larger distance between vice nozzle and main nozzle has better convergence trend, it reduces the decay which causes by the airflow propagation, promotes airflow movement and increases temperatures changes without any vortex increase in sensitive cavity, so it can improve the sensitive of fluidic gyroscope.

Influence of the Outlet Aperture of Sensitive Chamber on the Stability of Fluidic Gyroscope

2012 ◽  
Vol 542-543 ◽  
pp. 1096-1099
Author(s):  
Bao Li Zhang ◽  
Lin Hua Piao ◽  
Quan Gang Yu ◽  
Chuan Zhi Mei ◽  
Xia Ding ◽  
...  
Keyword(s):  
Finite Element ◽  
Model Building ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Airflow Velocity ◽  
Equation Solving ◽  
Airflow Distribution ◽  
Element Simulation ◽  
Two Dimensional Model ◽  
The Stability

In this paper, influence of the outlet aperture of sensitive chamber on the stability of fluidic gyroscope has been studied. Using ANSYS-FLOTRAN CFD software, the finite element simulation was conducted by a series of procedures, such as two-dimensional model building of fluidic gyro, meshing, loads applying and equation solving, we calculated the airflow distribution in sensitive chamber of fluidic gyro with different outlet apertures. The results show that the airflow would decay and diffuse after it injects into the chamber through nozzle, the bigger the outlet aperture, the smaller the pressure in the outlet-side and the airflow velocity discharged from the outlet, and the more seriously the airflow decay and spread. An effective way to improve the stability and structural optimization of the fluidic gyro output has been studied in this paper.

Finite Element Analysis of Different Outlet Diameter on Fluidic Gyroscope Performance

2014 ◽  
Vol 945-949 ◽  
pp. 1920-1923
Author(s):  
Jing Bo Chen ◽  
Lin Hua Piao ◽  
Jing Jing Zhao ◽  
Xia Ding
Keyword(s):  
Finite Element ◽  
Model Building ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Airflow Velocity ◽  
Element Analysis ◽  
Temperature Changes ◽  
Equation Solving ◽  
Airflow Distribution ◽  
Element Simulation

In this paper, airflow of two different outlet diameters are analyzed contrastively of fluidic gyroscope. Using ANSYS-FLOTRAN CFD software, the finite element simulation is conducted by a series of procedures, such as two-dimensional model building of gyroscope, meshing, loads applying and equation solving, and two dimensional airflow distribution of different outlet diameters in sensitive element are calculated. The results show that, velocity at the outlet Vsum=0.53872m/s which diameter of outlet d=3mm, and which is 35.9% of velocity of the inlet, airflow velocity in the outlet increases by 7.4% than d=4mm at the outlet. It accelerates velocity of fluidic beam without any vortex increases in sensitive cavity when d=3mm, and it also increases thermal wires temperature changes and improves the sensitivity of fluidic gyroscope.

Finite Element Analysis of Nozzle Dimension Influence on Fluidic Gyroscope Performance

2013 ◽  
Vol 756-759 ◽  
pp. 4690-4693
Author(s):  
Jing Bo Chen ◽  
Lin Hua Piao ◽  
Jin Tang
Keyword(s):  
Finite Element ◽  
Sensitive Element ◽  
Model Building ◽  
Large Diameter ◽  
Small Diameter ◽  
Two Dimensional ◽  
Element Analysis ◽  
Temperature Changes ◽  
Equation Solving ◽  
Element Simulation

In this paper, research the influence on nozzle dimension in the sensitive element of fluidic gyroscope. Airflow of two different nozzle dimensions is analyzed contrastively in the sensitive element of fluidic gyroscope. Using ANSYS-FLOTRAN CFD software, the finite element simulation is conducted by a series of procedures, such as two-dimensional model building of fluidic gyroscope, meshing, loads applying and equation solving. The two dimensional airflow distributions of different nozzle diameters in sensitive element of fluidic gyroscope are calculated. The results show that, compared with large diameter and small diameter nozzle of fluidic gyroscope, airflow velocity in the outlet increases by 10.1%, and 31.3% of velocity in the nozzle in large diameter nozzle. It promotes airflow circulation and reduces airflow accumulation in the sensitive cavity without any vortex increase in large nozzle, it increases thermal wires temperature changes and improves the resolution and sensitivity of fluidic gyroscope.

Finite Element Analysis of Flow Distribution on Nozzle Array Fluidic Gyroscope Performance

2013 ◽  
Vol 756-759 ◽  
pp. 4353-4356
Author(s):  
Jing Bo Chen ◽  
Lin Hua Piao ◽  
Jin Tang
Keyword(s):  
Finite Element ◽  
Model Building ◽  
Flow Distribution ◽  
Normal Structure ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Element Analysis ◽  
Equation Solving ◽  
Element Simulation ◽  
Array Structure

In this paper, the flow distribution in sensitive element of nozzle array structure gyroscope is analyzed. Using ANSYS-FLOTRAN CFD software, the finite element simulation is conducted by a series of procedures, such as two-dimensional model building of fluidic gyroscope, mesh, load applying and equation solving. The two-dimensional airflow distributions of nozzle array structure and normal structure gyroscopes are calculated. The results show that the highest velocity of nozzle array structure fluidic gyroscope is 0.71455m/s at the outlet, which is 47.6% of the nozzle velocity, and velocity is increased by 19.5% than the normal nozzle structure. By using nozzle array structure which can reduce velocity of vortex in sensitive cavity, promote airflow movement, increase temperatures changes and improve the sensitivity of fluidic gyroscope.

Study on the Improvement of Measurement Range of Fluidic Gyroscope

2012 ◽  
Vol 542-543 ◽  
pp. 1065-1068
Author(s):  
Bao Li Zhang ◽  
Lin Hua Piao ◽  
Quan Gang Yu ◽  
Chuan Zhi Mei ◽  
Xia Ding ◽  
...  
Keyword(s):  
Model Building ◽  
Flow Distribution ◽  
Measurement Range ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Equation Solving ◽  
Upper Limit ◽  
Airflow Distribution ◽  
Element Simulation ◽  
Two Dimensional Model

In this paper we have a comparative study to improve the measurement range of the fluidic gyroscope. Using ANSYS-FLOTRAN CFD software, finite element simulation was conducted by a series of procedures, such as two-dimensional model building, meshing, applied loads and equation solving, we calculated the flow distribution in the sensitive component of fluidic gyroscope with single nozzle and nozzle array. The results show that the upper limit measurement of fluidic gyroscope is the input angular velocity when fluidic column axis deflects to the position of thermistors, and using nozzle array can change the airflow distribution in the sensitive component and achieve the purpose of improving the measurement range of fluidic gyroscope.

Three-Dimensional FEM Analysis of the Gas Pendulum Characteristic for Airflow Level Posture Sensor

2011 ◽  
Vol 271-273 ◽  
pp. 216-219
Author(s):  
Ming Ming Ji ◽  
Lin Hua Piao ◽  
Bai Hua Li
Keyword(s):  
Sensitive Element ◽  
Model Building ◽  
Three Dimensional ◽  
Fem Analysis ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Equation Solving ◽  
Element Simulation ◽  
Hermetic Chamber

Using ANSYS-FLOTRAN CFD program, the finite element simulation is conducted by a series of procedures, such as three-dimensional model building of airflow inclination sensor, network modifying, loads applying and equation solving. The flow field in three-dimensional hermetic chamber of sensitive element of airflow level posture sensor is calculated, FEM analysis has been obtained. The numerical results show that under the buoyancy lift affecting, the direction of nature convection gas always keeps the vertical upward in two-dimensional enclosure, nature convection gas has the pendulum characteristic, and when the dimensional enclosure is inclined, temperature distribution at the several points in dimensional enclosure will change with the tilt angle. The pendulum characteristic can be utilized to measure the level posture by the airflow level posture sensor.

The Finite Element Simulation of Electromagnetic Powder Compaction Drive Force

2010 ◽  
Vol 37-38 ◽  
pp. 1473-1477
Author(s):  
Xiao Zhou ◽  
Jun Liu
Keyword(s):  
Finite Element ◽  
Great Influence ◽  
Powder Compaction ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Ansys Software ◽  
Element Simulation ◽  
General Rules ◽  
Two Dimensional Model ◽  
Electromagnetic Pressure

In powder compaction, the great influence of the drive structure upon the electromagnetic force is a key problem to be addressed. A simulation is carried out to analyze the parameters of electromagnetic compaction drive structure by using ANSYS software. And in the two-dimensional model, the study focuses on the effects on electromagnetic pressure, which are produced by the bore and height of the coil, the radius and resistivity of the driver slice, and interval between coil and driver slice. The final results show that electromagnetic pressure of inverse correlates with other parameters of different forms and will grow slowly if the radius is increasing. On the basis of simulation, we draw the general rules of plane coil and driver slice parameter selection.

The Comparative Study on Flow Field in Sensitive Element of Fluidic Gyroscope

2013 ◽  
Vol 756-759 ◽  
pp. 1455-1458
Author(s):  
Jin Tang ◽  
Lin Hua Piao ◽  
Bao Li Zhang ◽  
Jing Bo Chen
Keyword(s):  
Sensitive Element ◽  
Model Building ◽  
Two Dimensional ◽  
Equation Solving ◽  
Airflow Distribution ◽  
Element Simulation ◽  
Loop Channel ◽  
The Comparative Study ◽  
Gradient Change ◽  
Better Than

In this paper, the airflow of two different chamber structures is analyzed contrastively in the sensitive element of fluidic gyroscopes. Using ANSYS-FLOTRAN CFD software, the finite element simulation is conducted by a series of procedures, such as two-dimensional model building of fluidic gyroscope, meshing, loads applying and equation solving, we calculate the two dimensional airflow distribution of rectangle chamber and streamline chamber in sensitive element of fluidic gyroscope. The results show that the airflow velocity of the exit section in the streamline chamber which is 28.87% of the nozzle velocity is higher than that in the rectangle chamber structure, so the streamline chamber structure brings airflow together to a certain extent, and it also reduces the airflow accumulation in the chamber and smoothes airflow within the loop channel, lastly velocity gradient change in the streamline chamber is greater than that in the rectangle chamber, and the resolution of fluidic gyroscope is better than that with rectangle chamber.

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