Study on Improving Resolution of Fluidic Gyroscope

2012 ◽  
Vol 542-543 ◽  
pp. 731-734
Author(s):  
Chuan Zhi Mei ◽  
Lin Hua Piao ◽  
Quan Gang Yu ◽  
Bao Li Zhang ◽  
Xia Ding ◽  
...  
Keyword(s):  
Sensitive Element ◽  
Model Building ◽  
Flow Distribution ◽  
Velocity Difference ◽  
Array Type ◽  
Equation Solving ◽  
Element Simulation ◽  
Flow Gradient ◽  
Outlet Flow ◽  
Array Structure

This paper presents a comparative study to improve the resolution of the fluidic gyro. Using ANSYS-FLOTRAN-CFD software, the finite element simulation has been conducted by series of procedures, such as model building, meshing, loads applying and equation solving, the flow distribution in the sensitive element of the single nozzle and nozzle array fluidic gyro was calculated separately. The results show that the air outlet flow gradient of the array type nozzle increases by 1.1%, the flow velocity difference of symmetrically heat resistance wires in sensitive element increases by 14.3%; the nozzle array structure can effectively improve the resolution of the 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.

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 Temperature and Pressure on Nozzle Array Fluidic Gyroscope

2014 ◽  
Vol 945-949 ◽  
pp. 2195-2198
Author(s):  
Jing Bo Chen ◽  
Lin Hua Piao ◽  
Jing Jing Zhao ◽  
Xia Ding
Keyword(s):  
Model Building ◽  
Structure Optimization ◽  
Dimensional Model ◽  
Heat Temperature ◽  
Temperature Changes ◽  
Pressure Distributions ◽  
Equation Solving ◽  
Element Simulation ◽  
Array Structure ◽  
Temperature And Pressure

In this paper, the temperature and pressure 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 temperature and pressure distributions of nozzle array structure fluidic gyroscopes are calculated. The results show that the thermal wires heat temperature of the surrounding gas which place at 1.5mm from the outlet, and which produce internal temperature gradient in sensitive cavity, temperature changes symmetry of the cavity center. The pressure near the outlet is higher than any other position in the cavity, and which is 0.21109Pa. In this paper, the structure optimization of nozzle array gyroscope which provides effective theoretical basis for improving its performance.

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.

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.

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.

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.

Study on Nozzle Array Structure Fluidic Gyroscope

2012 ◽  
Vol 542-543 ◽  
pp. 727-730
Author(s):  
Chuan Zhi Mei ◽  
Lin Hua Piao ◽  
Quan Gang Yu ◽  
Bao Li Zhang ◽  
Xia Ding ◽  
...  
Keyword(s):  
Angular Velocity ◽  
Sensitive Element ◽  
Impact Resistance ◽  
Measurement Range ◽  
Test Results ◽  
Velocity Difference ◽  
Wide Range ◽  
Array Structure ◽  
The Impact ◽  
Better Than

This paper reports about a nozzle array structure fluidic gyroscope. The gyro used setting sub-nozzle around the main nozzle to inhibit the attenuation which had been caused by the main nozzle jet column spread out and to increase the angular velocity difference of sensitive element in the thermal resistance wire when the jet flow rate had been input, thereby to improve the performance of the jet gyro. The test results showed that: a resolution of better than 0.1°/s nozzle formation jet gyro sensitivity better than 10mv/(0.1°/s), the measurement range is better than ± 60°/s; non-linearity of better than 1%.The impact of the gyroscope impact resistance capability, small size and wide range of applications.

Three-Dimensional FEM Analysis of Sensitive Mechanism of Airflow Level Posture Sensor Based on Thermoelectric Coupling

2011 ◽  
Vol 271-273 ◽  
pp. 211-215
Author(s):  
Ming Ming Ji ◽  
Lin Hua Piao ◽  
Bai Hua Li
Keyword(s):  
Finite Element ◽  
Model Building ◽  
Three Dimensional ◽  
Fem Analysis ◽  
Three Dimensional Model ◽  
Three Dimensional Modeling ◽  
Equation Solving ◽  
Dimensional Modeling ◽  
Element Simulation ◽  
Simulation Based

Using ANSYS program, the finite element simulation based on thermoelectric coupling is conducted by a series of procedures, such as three-dimensional model building of airflow level posture sensor according to the actual size of the proportion, network modifying, loads applying and equation solving. The sensitive mechanism of airflow level posture sensor is explained by finite element method. The numerical results show that compared with two-dimensional modeling, the simulation result of three-dimensional modeling and thermoelectric analysis methods are more comprehensive and accurate, which provides more reliable basis for practical research of the airflow level posture sensor.

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