A drag-reducing stabilizing device for a supersonic rocket sled and a design method

Abstract

The application discloses a drag-reducing stabilizing device and a design method for a supersonic rocket sled, which can optimize the aerodynamic characteristics of a load during separation, reduce the drag, and enhance the stability. The technical scheme of the application is as follows: a drag-reducing stabilizing device for a supersonic rocket sled, which is installed between a boost stage and a load of the rocket sled and comprises a drag-reducing plate, a supporting rod and a sliding block; the drag-reducing plate has the same shape as the surface of the boost stage, the drag-reducing plate is integrated with the boost stage when the drag-reducing plate is closed, and the upper part of the drag-reducing plate is matched with the shape of the load when the drag-reducing plate is opened. The sliding block is a driving moving part and drives the supporting rod to open the drag-reducing plate. The application further provides a drag-reducing stabilizing method for the supersonic rocket sled, and a computational fluid dynamics grid model is established to perform simulation, so that the shock wave generated during the operation of the rocket sled is borne and dispersed by the drag-reducing plate, and the safety of the load separation process is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical design, in particular to a drag-reducing stabilizing device for a supersonic rocket sled and a design method. BACKGROUND

[0002] Ground high-speed boosting provides a high take-off speed for a spacecraft, which is of great significance to improving the efficiency-cost ratio of future near-space and space round-trip spacecraft and realizing reusable space round-trip.

[0003] In the development of ground high-speed boosting devices, there are problems such as unclear aerodynamic characteristics, improper control strategy, and difficulty in determining the motion trend. In view of the complex flow field in the two-stage separation process, the shock wave structure changes rapidly in the transformation process from gap flow (subsonic / supersonic blocked flow) to channel flow (multi-wave supersonic flow), and strong interference factors such as shock wave and shock wave, shock wave and boundary layer, and shock wave and vortex directly affect the aerodynamic characteristics of the spacecraft during separation.

[0004] Therefore, it is necessary to design a drag-reducing stabilizing device between the rocket sled boosting stage and the load, to optimize the aerodynamic characteristics of the load during separation, reduce the drag, and enhance the stability. SUMMARY

[0005] Therefore, the present application provides a drag-reducing stabilizing device for a supersonic rocket sled and a design method, which can optimize the aerodynamic characteristics of the load during separation, reduce the drag, and enhance the stability.

[0006] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows: a drag-reducing stabilizing device for a supersonic rocket sled, which is installed between the boosting stage and the load of the rocket sled, comprising a drag-reducing plate, a support rod, and a sliding block.

[0007] The shape of the drag-reducing plate is the same as the surface of the boosting stage, the drag-reducing plate is integrated with the boosting stage when closed, and the upper part of the drag-reducing plate matches the shape of the load when opened.

[0008] The sliding block is a main active component, which drives the support rod to open the drag-reducing plate.

[0009] The support rod is used to connect the sliding block and the drag-reducing plate, and drive the drag-reducing plate to open and close.

[0010] Further, the sliding block is driven by a hydraulic cylinder or an air cylinder.

[0011] The present application also provides a design method for a drag-reducing stabilizing device for a supersonic rocket sled, which adopts the following steps:

[0012] Step (1) Based on the shape of the rocket sled boosting stage and the relative position of the load and the boosting stage, determine the component parts and layout scheme of the drag-reducing stabilizing device.

[0013] Step (2) uses computational fluid dynamics CFD to simulate the working process of the rocket sled under supersonic speed, and determines the effectiveness of the drag reduction stabilizing device.

[0014] Further, the drag reduction stabilizing device in step (1) is installed between the boost stage and the load of the rocket sled, and includes a drag reduction plate, a support rod, and a sliding block.

[0015] The shape of the drag reduction plate is the same as the surface of the boost stage, and the drag reduction plate is integrated with the boost stage when closed, and the upper part of the drag reduction plate matches the shape of the load when opened.

[0016] The sliding block is a main active component, which drives the support rod to open the drag reduction plate.

[0017] The support rod is used to connect the sliding block and the drag reduction plate, and drive the drag reduction plate to open and close.

[0018] Further, in step (1), the drag reduction plate and other mechanisms are designed according to the boost stage of the rocket sled, wherein the entire device is integrated with the boost stage when the drag reduction plate is closed, without affecting the aerodynamic shape of the boost stage, and the entire device is driven by the power sliding block when expanded.

[0019] Further, in step (2), the computational fluid dynamics simulation results show that when the rocket sled moves at a speed of 1.6Ma, the resistance of the load is reduced by the expansion of the drag reduction stabilizing device, and the stability at the separation time is improved.

[0020] Advantages:

[0021] 1. A drag reduction stabilizing device for a supersonic rocket sled, a drag reduction stabilizing device is designed between the boost stage and the load of the rocket sled, the drag reduction stabilizing device mainly consists of a drag reduction plate, a sliding block, and a support rod, which can optimize the aerodynamic characteristics of the load at the separation time, reduce the resistance, and enhance the stability.

[0022] 2. Based on the analysis of the separation characteristics of the rocket sled load and the boost stage, and based on the reflection characteristics of the shock wave between the load and the boost stage, a drag reduction stabilizing method for a supersonic rocket sled is proposed, and a computational fluid dynamics grid model is established for simulation, so that the shock wave generated by the rocket sled during operation is borne and dispersed by the drag reduction plate, ensuring the safety of the load separation process.

[0023] 3. The present application proposes a drag reduction stabilizing method for a supersonic rocket sled, which can expand during the supersonic operation of the rocket sled, reduce the resistance of the rocket sled, and ensure the stability during the load separation process. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A flow chart of a design method for a drag reduction stabilizing device for a supersonic rocket sled;

[0025] Figure 2 A schematic diagram of the drag reduction stabilizing device in a closed state;

[0026] Figure 3 A schematic diagram of the drag reduction stabilizing device in an open state;

[0027] Figure 4 A schematic diagram of the drag reduction device structure;

[0028] Figure 5 A load abdominal pressure distribution curve when the drag reduction stabilizing device is closed;

[0029] Figure 6 A load abdominal pressure distribution curve when the drag reduction stabilizing device is opened. DETAILED DESCRIPTION

[0030] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0031] The present application provides a drag reduction stabilizing device for a supersonic rocket sled, which is installed between a boost stage and a load of the rocket sled, and includes a drag reduction plate, a support rod, and a sliding block.

[0032] The drag reduction plate has the same shape as the surface of the boost stage, and is integrated with the boost stage when the drag reduction plate is closed, and the upper part of the drag reduction plate matches the shape of the load when the drag reduction plate is opened.

[0033] The sliding block is a main active component, and drives the support rod to open the drag reduction plate; in the embodiment of the present application, the sliding block is driven by a hydraulic cylinder or a pneumatic cylinder.

[0034] The support rod is used to connect the sliding block and the drag reduction plate, and drives the drag reduction plate to open and close.

[0035] Figure 2 A schematic diagram of the drag reduction stabilizing device in a closed state; Figure 3 A schematic diagram of the drag reduction stabilizing device in an open state; Figure 4 A schematic diagram of the drag reduction device structure.

[0036] A design method for a drag reduction stabilizing device for a supersonic rocket sled, the flow chart is as shown in Figure 1 The following steps are adopted:

[0037] Step (1) determines the component parts and layout scheme of the drag reduction stabilizing device based on the shape of the boost stage of the rocket sled and the relative position of the load and the boost stage; in step (1), the drag reduction plate and other mechanisms are designed according to the boost stage of the rocket sled, wherein the drag reduction plate is integrated with the boost stage in a closed state, does not affect the aerodynamic shape of the boost stage, and is opened by the power sliding block.

[0038] Step (2) uses computational fluid dynamics (CFD) to simulate the working process of the rocket sled under supersonic conditions to determine the effectiveness of the drag reduction stabilizing device.

[0039] In step (2), the supersonic rocket sled model is established to simulate the working process of the drag reduction stabilizing system, and the drag reduction stabilizing effect is determined according to the drag force received by the load and the pressure distribution in the abdomen. The greater the reduction in load drag, the more balanced the pressure distribution in the abdomen, and the better the drag reduction stabilizing effect. In the computational fluid dynamics simulation results established in step (2), when the rocket sled moves at a speed of 1.6Ma, the drag reduction stabilizing device is deployed to reduce the drag received by the load and improve the stability at the moment of separation.

[0040] The drag reduction stabilizing device in step (1) is as described above. The device is installed between the booster stage and the load of the rocket sled and includes a drag reduction plate, a support rod, and a sliding block. The drag reduction plate has the same shape as the surface of the booster stage, and when the drag reduction plate is closed, it is integrated with the booster stage. When the drag reduction plate is opened, its upper part matches the shape of the load. The sliding block is a driven moving part that drives the support rod to open the drag reduction plate. The support rod is used to connect the sliding block and the drag reduction plate to drive the drag reduction plate to open and close.

[0041] In this example, the rocket sled moves at a speed of 1.6Ma, and the drag received by the load without deploying the drag reduction plate is 10800N, and there are two pressure peaks in the abdomen due to shock wave reflection. After deploying the drag reduction plate, the drag received by the load is 8600N, and the pressure peak in the abdomen is only one, and the drag reduction stabilizing effect is ideal. Figure 5 The pressure distribution curve in the abdomen of the load when the drag reduction stabilizing device is closed. Figure 6 The pressure distribution curve in the abdomen of the load when the drag reduction stabilizing device is opened.

[0042] In summary, the above is only a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A design method for a drag reduction and stabilization device for a supersonic rocket skid, characterized in that, The following steps are used: Step (1) Based on the shape of the rocket skid booster stage and the relative position of the load to the booster stage, determine the components and layout scheme of the drag reduction and stabilization device; Step (2) uses computational fluid dynamics (CFD) to simulate the working process of the rocket skid under supersonic conditions to determine the effectiveness of the drag reduction and stabilization device; the drag reduction and stabilization effect is judged based on the magnitude of the resistance on the load and the pressure distribution on the belly. The greater the reduction of load resistance and the more balanced the pressure distribution on the belly of the load, the better the drag reduction and stabilization effect. In step (1), the drag reduction and stabilization device is installed between the booster stage and the load of the rocket skid, including a drag reduction plate, a support rod and a slider; so that the shock wave generated by the rocket skid during operation is borne and dispersed by the drag reduction plate. The drag-reducing plate has the same shape as the surface of the booster stage. When the drag-reducing plate is closed, it is integrated with the booster stage. When the drag-reducing plate is open, its upper part matches the shape of the load. The slider is an active moving component that drives the support rod to open the drag reduction plate. The support rod is used to connect the slider and the drag-reducing plate, and to drive the drag-reducing plate to open and close.

2. The design method of a drag reduction and stabilization device for a supersonic rocket skid as described in claim 1, characterized in that, In step (1), the drag reduction plate and other mechanism dimensions are designed according to the rocket skid booster stage. When the drag reduction plate is closed, the entire device is integrated with the booster stage and does not affect the aerodynamic shape of the booster stage. When it is deployed, the entire device is driven by the power slider.

3. The design method of a drag reduction and stabilization device for a supersonic rocket skid as described in claim 1, characterized in that, In the computational fluid dynamics simulation results established in step (2), when the rocket sled moves at a speed of 1.6 Ma, the drag reduction and stabilization device reduces the resistance on the load and improves the stability at the moment of separation.

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