Method and device for calculating performance of sand control device

Abstract

The application provides a method and device for calculating the performance of a sand control device, the method comprising: step 1: obtaining pressure measurement data ΔP1 at different speeds V through a vortex tube panel model test; step 2: obtaining coefficients a and b according to the V and ΔP1 by using a formula; step 3: calculating viscous drag coefficients and inertial drag coefficients C by using a formula and a corresponding relationship about V; step 4: inputting the viscous drag coefficients and the inertial drag coefficients C into a calculation model of the vortex tube panel and performing simulation to obtain pressure simulation data ΔP2, and fine-tuning the viscous drag coefficients and the inertial drag coefficients C according to the pressure simulation data ΔP2 so that the pressure measurement data ΔP in the calculation model is close to the actual pressure loss of the vortex tube panel; and step 5: inputting the viscous drag coefficients and the inertial drag coefficients C into a calculation model of the sand control device to perform simulation calculation and obtain performance data of the sand control device.

Description

Technical Field

[0001] This invention relates to the field of electromechanical engineering, and in particular to a method and apparatus for calculating the performance of a sand-proof device. Background Technology

[0002] As an important aerial platform, helicopters frequently need to hover, take off, and land near the ground. If foreign objects such as sand, dust, rain, and snow enter the engine through the air intake, they will inevitably pose a significant threat to the engine's safe operation, thus jeopardizing flight safety. Therefore, to ensure the flight safety and performance of helicopters, existing helicopters are generally equipped with sand protection devices.

[0003] Currently, the most widely used sand control device for helicopter air intakes is the multi-tube sand control device. Its core unit is the vortex tube. The vortex tube panel integrates a large number of vortex tubes to form the functional units of the sand control device. The sand discharge channels between these functional units are rationally planned to form the final sand control device. Before processing and testing the sand control device, in order to optimize the design as much as possible, it is necessary to perform three-dimensional modeling and simulation of the sand control device. This inevitably requires preprocessing and calculation of hundreds or even thousands of vortex tubes, resulting in a huge amount of computation and working time that is almost unacceptable in engineering practice. Summary of the Invention

[0004] This application provides a method for calculating the performance of a sand control device, which has the advantages of being fast, efficient, and having small errors, and has great application potential in the field of engineering calculation.

[0005] In a first aspect, this application provides a method for calculating the performance of a sand control device, the method comprising:

[0006] Step 1: Obtain pressure measurement data ΔP at different velocities V through pressure measurement experiments using a vortex tube panel model.

[0007] Step 2: Based on the given V and ΔP, use the formula We obtain coefficients a and b;

[0008] Step 3: Based on coefficients a and b, the thickness Δn of the vortex tube panel, and the dynamic viscosity of air... Using the formula and Based on the corresponding relationship with V, the viscous drag coefficient is calculated. and the inertial drag coefficient C;

[0009] Step 4: Adjust the viscous resistance coefficient The inertial drag coefficient C is input into the calculation model of the vortex tube panel and simulated to obtain the pressure simulation data ΔP2. The viscous drag coefficient is then finely adjusted based on the pressure simulation data ΔP2. And the inertial drag coefficient C, so that the pressure measurement data ΔP in the calculation model is close to the actual pressure loss of the vortex tube panel;

[0010] Step 5: Adjust the viscous resistance coefficient The inertial drag coefficient C is substituted into a 1:1 sand control device calculation model for simulation calculation to obtain the performance data of the sand control device;

[0011] Specifically, performance data includes the total pressure loss ΔP of the sand control device. 总压 And separation efficiency η.

[0012] Specifically, step 5 includes:

[0013] Viscous resistance coefficient The inertial drag coefficient C is substituted into a 1:1 sand control device calculation model for simulation calculation to obtain the total outlet pressure P of the sand control device. 出口 and total inlet pressure P 入口 ;

[0014] P 出口 and P 入口 Through formula Calculate the total pressure loss ΔP of the sand control device. 总压 .

[0015] Specifically, step 5 includes:

[0016] The intake volume *m* and scavenging ratio of vortex tube assemblies at different positions of different vortex tube panels were obtained through simulation calculations. The separation efficiency of each vortex tube group is obtained based on the air intake and scavenging ratio.

[0017] With m i / m is used as a weighting coefficient, through the formula Calculate and obtain the separation efficiency η of the entire device, where, For the separation efficiency of the vortex tube assembly, m i This refers to the intake air volume of the vortex tube assembly. denoted as scavenging ratio of the vortex tube assembly, and m as the total air intake of the sand control device.

[0018] Specifically, the computational model of the vortex tube panel is a fluid simulation model of the vortex tube panel established using ANSYS.

[0019] Secondly, this application provides a calculation device for the performance of a sand control device. The calculation device includes a pressure measurement data acquisition unit, a coefficient calculation unit, and a simulation unit, wherein:

[0020] The pressure measurement data acquisition unit is used to obtain pressure measurement data ΔP at different speeds V through pressure measurement experiments using a vortex tube panel model;

[0021] The coefficient calculation unit is used to calculate the coefficients based on the given V and ΔP using the formula... We obtain coefficients a and b; based on coefficients a, b, and the thickness of the vortex tube panel... Dynamic viscosity of air Using the formula and Based on the corresponding relationship with V, the viscous drag coefficient is calculated. and the inertial drag coefficient C;

[0022] The simulation unit is used to simulate the viscous resistance coefficient. The inertial drag coefficient C is input into the calculation model of the vortex tube panel and simulated to obtain the pressure simulation data ΔP2. The viscous drag coefficient is then finely adjusted based on the pressure simulation data ΔP2. And the inertial drag coefficient C, so that the pressure measurement data ΔP in the calculation model is close to the actual pressure loss of the vortex tube panel; and the viscous drag coefficient The inertial drag coefficient C is substituted into a 1:1 sand control device calculation model for simulation calculation to obtain the performance data of the sand control device.

[0023] Specifically, performance data includes the total pressure loss ΔP of the sand control device. 总压 And separation efficiency η.

[0024] Specifically, the simulation unit is used for:

[0025] Viscous resistance coefficient The inertial drag coefficient C is substituted into a 1:1 sand control device calculation model for simulation calculation to obtain the total outlet pressure P of the sand control device. 出口 and total inlet pressure P 入口 ;

[0026] P 出口 and P 入口 Through formula Calculate the total pressure loss ΔP of the sand control device. 总压 .

[0027] In summary, this application provides a method for calculating the performance of a sand control device. By utilizing experimental data from the vortex tube panel and verifying the porous media model, the obtained viscous drag coefficient and inertial drag coefficient are input into the sand control device model to obtain the performance data of the entire sand control device. This eliminates the need for 3D modeling and preprocessing of all vortex tubes, avoiding high computational resources and time costs, and achieving relatively accurate results within an acceptable computational load and timeframe. Attached Figure Description

[0028] Figure 1 A flowchart illustrating a method for calculating the performance of a sand control device provided in this application. Detailed Implementation

[0029] like Figure 1 As shown, the method for calculating the performance of a sand control device provided in this application includes:

[0030] Step 1: Obtain pressure measurement data ΔP at different velocities V through pressure measurement experiments using a vortex tube panel model.

[0031] Step 2: Based on the given V and ΔP, use the formula We obtain coefficients a and b;

[0032] Step 3: Based on coefficients a and b, the thickness Δn of the vortex tube panel, and the dynamic viscosity of air... Using the formula and Based on the corresponding relationship with V, the viscous drag coefficient is calculated. and the inertial drag coefficient C;;

[0033] Step 4: Adjust the viscous resistance coefficient The inertial drag coefficient C is input into the calculation model of the vortex tube panel and simulated to obtain the pressure simulation data ΔP2. The viscous drag coefficient is then finely adjusted based on the pressure simulation data ΔP2. And the inertial drag coefficient C, so that the pressure measurement data ΔP in the calculation model is close to the actual pressure loss of the vortex tube panel;

[0034] The calculation model for the vortex tube panel is a fluid simulation model of the vortex tube panel established using ANSYS.

[0035] Step 5: Adjust the viscous resistance coefficient The inertial drag coefficient C is substituted into a 1:1 sand control device calculation model for simulation calculation to obtain the performance data of the sand control device;

[0036] The performance data includes the total pressure loss ΔP of the sand control device. 总压 And separation efficiency η.

[0037] Specifically, step 5 includes:

[0038] Step 51: Adjust the viscous resistance coefficient The inertial drag coefficient C is substituted into a 1:1 sand control device calculation model for simulation calculation to obtain the total outlet pressure P of the sand control device. 出口 and total inlet pressure P 入口 ; to the P 出口 and P 入口 Through formula Calculate the total pressure loss ΔP of the sand control device. 总压 ;

[0039] Step 52: Obtain the intake volume m and scavenging ratio of the vortex tube assembly at different positions of different vortex tube panels through simulation calculation. The separation efficiency of each vortex tube group is obtained based on the intake volume and scavenging ratio; in m i / m is used as a weighting coefficient, through the formula Calculate and obtain the separation efficiency η of the entire device, where, For the separation efficiency of the vortex tube assembly, m i This refers to the intake air volume of the vortex tube assembly. denoted as scavenging ratio of the vortex tube assembly, and m as the total air intake of the sand control device.

[0040] It should be noted that, in terms of separation efficiency, the vortex arrays on each vortex tube panel are first grouped together, with vortex tube arrays of the same cross section along the flight direction as a group. This group can be considered to have the same air intake on the vortex tube panel.

[0041] Compared to overall modeling and simulation, the computational method proposed in this invention can greatly reduce model preprocessing and computation time, reduce computational load and hardware requirements, and shorten computation time. It has the advantages of being fast, efficient, and having small errors, and has great application potential in the engineering field.

[0042] In summary, this invention provides an efficient method for calculating the performance of a sand control device. By utilizing experimental data from the vortex tube panel and verifying the porous media model, the obtained viscous drag coefficient and inertial drag coefficient are input into the sand control device model to obtain the performance data of the entire device. This eliminates the need for 3D modeling and preprocessing of all vortex tubes, avoiding high computational resource and time costs, and achieving relatively accurate results within an acceptable computational load and timeframe. This invention has the advantages of being fast, efficient, and having low error, and has significant application potential in the field of engineering calculations.

Claims

1. A method for calculating the performance of a sand control device, characterized in that, The methods include: Step 1: Obtain pressure measurement data ΔP at different velocities V through pressure measurement experiments using a vortex tube panel model. Step 2: Based on the given V and ΔP, use the formula We obtain coefficients a and b; Step 3: Based on coefficients a and b, the thickness Δn of the vortex tube panel, and the dynamic viscosity of air... Using the formula and Based on the corresponding relationship with V, the viscous drag coefficient is calculated. and the inertial drag coefficient C; Step 4: Adjust the viscous resistance coefficient The inertial drag coefficient C is input into the calculation model of the vortex tube panel and simulated to obtain the pressure simulation data ΔP2. The viscous drag coefficient is then finely adjusted based on the pressure simulation data ΔP2. And the inertial drag coefficient C, so that the pressure measurement data ΔP in the calculation model is close to the actual pressure loss of the vortex tube panel; Step 5: Adjust the viscous resistance coefficient The inertial drag coefficient C is substituted into a 1:1 sand control device calculation model for simulation calculation to obtain the performance data of the sand control device; the performance data includes the total pressure loss ΔP of the sand control device. 总压 and separation efficiency η; Step 5 includes: adjusting the viscous resistance coefficient. The inertial drag coefficient C is substituted into a 1:1 sand control device calculation model for simulation calculation to obtain the total outlet pressure P of the sand control device. 出口 and total inlet pressure P 入口 ; to the P 出口 and P 入口 Through formula Calculate the total pressure loss ΔP of the sand control device. 总压 ; Step 5 includes: obtaining the intake volume m and scavenging ratio of the vortex tube assembly at different positions of different vortex tube panels through simulation calculations. The separation efficiency of each vortex tube group is obtained based on the intake volume and scavenging ratio; in m i / m is used as a weighting coefficient, through the formula Calculate and obtain the separation efficiency η of the entire device, where, For the separation efficiency of the vortex tube assembly, m i This refers to the intake air volume of the vortex tube assembly. denoted as scavenging ratio of the vortex tube assembly, and m as the total air intake of the sand control device.

2. The calculation method according to claim 1, characterized in that, The computational model of the vortex tube panel is a fluid simulation model of the vortex tube panel established using ANSYS.

3. A device for calculating the performance of a sand control device, characterized in that, The computing device includes a pressure measurement data acquisition unit, a coefficient calculation unit, and a simulation unit, wherein: The pressure measurement data acquisition unit is used to obtain pressure measurement data ΔP at different speeds V through pressure measurement experiments using a vortex tube panel model; The coefficient calculation unit is used to calculate the coefficients based on the given V and ΔP using the formula... We obtain coefficients a and b; based on coefficients a, b, and the thickness of the vortex tube panel... Dynamic viscosity of air Using the formula and Based on the corresponding relationship with V, the viscous drag coefficient is calculated. and the inertial drag coefficient C; The simulation unit is used to simulate the viscous resistance coefficient. The inertial drag coefficient C is input into the calculation model of the vortex tube panel and simulated to obtain the pressure simulation data ΔP2. The viscous drag coefficient is then finely adjusted based on the pressure simulation data ΔP2. And the inertial drag coefficient C, so that the pressure measurement data ΔP in the calculation model is close to the actual pressure loss of the vortex tube panel; and the viscous drag coefficient The inertial drag coefficient C is substituted into a 1:1 sand control device calculation model for simulation calculation to obtain the performance data of the sand control device; Performance data includes the total pressure loss ΔP of the sand control device. 总压 and separation efficiency η; The simulation unit is specifically used to simulate the viscous drag coefficient. The inertial drag coefficient C is substituted into a 1:1 sand control device calculation model for simulation calculation to obtain the total outlet pressure P of the sand control device. 出口 and total inlet pressure P 入口 ; to the P 出口 and P 入口 Through formula Calculate the total pressure loss ΔP of the sand control device. 总压 The intake volume *m* and scavenging ratio of the vortex tube assembly at different positions of different vortex tube panels were obtained through simulation calculations. The separation efficiency of each vortex tube group is obtained based on the intake volume and scavenging ratio; in m i / m is used as a weighting coefficient, through the formula Calculate and obtain the separation efficiency η of the entire device, where, For the separation efficiency of the vortex tube assembly, m i This refers to the intake air volume of the vortex tube assembly. denoted as scavenging ratio of the vortex tube assembly, and m as the total air intake of the sand control device.

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