Fluid-Structure Interaction Analysis of Parachute Finite Mass Inflation

Gao, Xinglong; Zhang, Qingbin; Qian, Ting

doi:10.1155/2016/1438727

Cited by 11 publications

(5 citation statements)

References 14 publications

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“…Due to the relatively low instantaneous velocity in the fluid-structure interaction simulation of low-speed airdrop parachutes during airdrop experiments, the air is considered an incompressible fluid [27]. Consider that a domain Ω f (t) is occupied by incompressible, viscous air with boundary Γ f (t), and Ω s (t) is the structure domain with boundary Γ s (t).…”

Section: Governing Equationsmentioning

confidence: 99%

Effect of Shear Modulus on the Inflation Deformation of Parachutes Based on Fluid-Structure Interaction Simulation

et al. 2023

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Parachutes and other inflatable aerodynamic decelerators usually use flexible fabrics due to their lightweight and high load-carrying capacity. The behavior of fabrics during complex deformations is mainly influenced by their shear properties. The shear properties of fabric can be explained by the shear stiffness or shear modulus. The design optimization of these inflatable structures relies on a detailed knowledge of the mechanical properties of the fabric material. To investigate the effect of shear modulus on the inflatable shapes of parachute canopies, an arbitrary Lagrangian–Eulerian coupling method based on the incompressible computational fluid dynamics solver and structural solver LS-DYNA is proposed. Finite element methods are used to describe continuous materials such as fabrics and airflow fields. The effects of the shear modulus on the inflated parachute shapes are investigated from the macroscopic and microscopic scales. A comparison analysis reveals that different shear moduli have little effect on the overall shape and in-plane shear strain of the parachute, while they have significant effects on the in-plane stress distribution and wrinkles of the parachute. The methods and conclusions of this paper can provide some reference for the materials design of parachutes in preforming stage.

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Section: Governing Equationsmentioning

confidence: 99%

Effect of Shear Modulus on the Inflation Deformation of Parachutes Based on Fluid-Structure Interaction Simulation

et al. 2023

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“…e tangential wheel-rail force and lateral wheel-rail force of the power wheel axle of a 300 km/h high-speed EMU were identified using the different directions of strain gauges to be pasted and the way of forming electric bridges in [9], and a finite element model was built to obtain the load and strain relationship. e strain electrical measurement method is used in [10] to test the dynamic strain of the suspension frame under the conditions of general flat bottom, double-wheel crossing, and single-wheel crossing of the ditch, and it is combined with VC++ for data processing to obtain the stress condition and the stress when the wheel passes through the ditch. Literature [11] uses the ECAL/AMS-02 dynamic strain measurement system, a three-way resistance strain gauge, a temperature compensation sheet, and an extrapolation method to calculate the obtained strain results to obtain the maximum principal value of each point.…”

Section: Related Workmentioning

confidence: 99%

Structure Strength Dynamic Strain Measurement Acquisition System Based on Data Fusion

Shen

Pei

2022

Scientific Programming

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Strain measurement technology plays an irreplaceable role in measuring the force change characteristics of mechanical components and monitoring important engineering structures. In structural health monitoring, dynamic stress and strain testing is the main way to determine its overall fatigue, and excessive stress will seriously affect the strength of the structure, causing the structure to deform or even break, which will affect the reliability of the experiment and the use of workpieces, so it is of great significance to carry out dynamic stress and strain tests on the structure. Resistance strain measurement technology is widely used in the civil engineering industry, but the principles of modern physics technology are unknown to many practitioners. Data fusion technology or information fusion technology is also called multisensor fusion technology. Using computer technology to automatically analyze and integrate the data processing process of the detection data from multiple sensors according to time sequence and certain criteria, it can complete the required decision-making and judgment.

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“…Even at low speeds, the prediction of parachute aerodynamic properties is difficult due to the nonlinear nature of structural deformations, especially for parachutes with complex arrangements such as slots or gaps [10,11]. The supersonic behavior of these parachutes involves complex, interdependent phenomena in fluid-structure interaction (FSI) studies which includes bluff and porous body aerodynamics, nonlinear structural dynamics, and the fully coupled interaction between compressible flow and shocks and a membrane structure undergoing large deformations.…”

Section: Introductionmentioning

confidence: 99%

Large-Eddy Simulations of a Hypersonic Re-Entry Capsule Coupled with the Supersonic Disk-Gap-Band Parachute

Peri,

Ingenito,

Teofilatto

2024

Aerospace

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The goal of this paper is to investigate the aerodynamic and aerothermodynamic behavior of the Schiaparelli capsule after the deployment of a supersonic disk-gap-band (DGB) parachute during its re-entry phase into the Martian atmosphere. The novelty of this work lies in the investigation by LES (large-eddy simulations) of the coupled interaction of the flow field generated behind the capsule and that in front of the flexible DGB parachute. These simulations are performed at an altitude of 10 km and a Mach number around 2, i.e., a regime in which large canopy-area oscillations are observed. LES results have shown a strong interaction between the bow shock, the recompression and expansion waves, high pressure, density and temperature gradients, heat flux towards the airstream and the body implying turbulence generation, ingestion, and amplification through the shock waves. Vortices released from the capsule at a frequency of about 52 Hz and 159 Hz, corresponding to Strouhal numbers of ~0.2 and 0.75, respectively, are the main factors responsible for the instabilities of the hypersonic re-entry capsule and the disk-gap-band parachute coupled system. The nonlinear turbulence flow field generated at the capsule back is amplified when passing the parachute bow shock, and this is responsible for the non-axisymmetric behavior around and behind the parachute that caused the uncontrolled capsule oscillations and the Schiaparelli mission failure. In fact, an LES of the parachute without the capsule, for the same conditions, show a completely axisymmetric field, varying in time, but axisymmetric. In order to avoid this turbulence amplification, dampening of the vortex shedding is critical. Different techniques have been already proposed for other applications. In the case of capsule re-entry, due to the high temperatures in front of the capsule behind the bow shock since air plasma is generated, damping of the vortex shedding could be achieved by means of magnetohydrodynamic (MHD) control.

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Fluid-Structure Interaction Analysis of Parachute Finite Mass Inflation

Cited by 11 publications

References 14 publications

Effect of Shear Modulus on the Inflation Deformation of Parachutes Based on Fluid-Structure Interaction Simulation

Effect of Shear Modulus on the Inflation Deformation of Parachutes Based on Fluid-Structure Interaction Simulation

Structure Strength Dynamic Strain Measurement Acquisition System Based on Data Fusion

Large-Eddy Simulations of a Hypersonic Re-Entry Capsule Coupled with the Supersonic Disk-Gap-Band Parachute

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