Optimization of the aerodynamic configuration of a tubular projectile based on blind Kriging

Zhao, Qiang; Chen, Zhihua; Huang, Zhengui; Zhang, Huanhao; Ma, Jingtan

doi:10.24200/sci.2017.20015

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…The simulation method utilized was the Lattice-Boltzmann method. In [21], numerical and experimental methods were applied to assess the coe cients of aerodynamic forces of rail vehicles on a hill with a speci c geometry. Despite a somewhat considerable number of experimental and numerical studies performed on aerodynamic forces on highspeed trains, few studies have been conducted to determine and assess the distance from the train's oor to the ground (ground clearance).…”

Section: Introductionmentioning

confidence: 99%

Investigating the effect of train speed and ground clearance on aerodynamics of a simplified high-speed train

Norouzi,

Hossainpour,

Rashidi

2023

Scientia Iranica

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The present paper investigates the e ect of train speed and ground clearance on aerodynamic forces of a simpli ed high-speed train. For this purpose, 20 di erent cases including trains with ve di erent speeds and four varied ground clearances were numerically simulated. The results showed that increasing the train speed had a dual e ect on increasing the vertical upward lift forces. Non-dimensional ground clearances above than 0.22 at speeds above 250 km/h resulted in dramatic upward lift forces and led to train instability. At ground clearances below than 0.092, a rise in the speed increased the downward force, enhancing the stability of the train. Moreover, further analysis of the ground clearance e ect demonstrated that at a ground clearance equal to about 0.048, the lift force remained approximately constant at di erent train speeds. The air velocity pro les for the train experienced a dimensionless rise with increase in the value of ground clearance, except for the front part of the train. This increase was precisely apparent at a speed of 350 km/h and resulted in a 29% increase in the air velocity along the sections below the train. This rise in speed may disrupt the balance of passengers and pedestrians as well as workers around the train.

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Section: Introductionmentioning

confidence: 99%

Investigating the effect of train speed and ground clearance on aerodynamics of a simplified high-speed train

Norouzi,

Hossainpour,

Rashidi

2023

Scientia Iranica

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“…By utilizing simple detection and control units, these mechanisms can considerably reduce costs while still achieving the desired precision. Currently, both domestic and international scholars primarily focus on the research of dynamic modeling [6], aerodynamic shape, ballistics optimization design [7][8][9][10], and control strategies [11] pertaining to two-dimensional trajectory correction projectiles. Pulse trajectory correction projectiles, in comparison to other correction projectile types, offer several advantages, including shorter response time, streamlined and efficient control, and reduced cost.…”

Section: Introductionmentioning

confidence: 99%

Robust Optimization Design of the Aerodynamic Shape and External Ballistics of a Pulse Trajectory Correction Projectile

Xing

et al. 2023

Applied Sciences

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To improve the tactical and technical performance of pulse correction projectiles while maintaining stability in uncertain conditions and considering practical engineering constraints, this study performs a multi-objective robust optimization design of the aerodynamic shape and external ballistics of a projectile. The study utilizes an aerodynamic force engineering algorithm and numerical trajectory calculations to obtain the projectile’s performance responses within the Latin hypercube design space. To enhance optimization efficiency, a stochastic Kriging surrogate model is established to capture the inherent uncertainty of limited input data. Ultimately, a Pareto optimal solution for the projectile is obtained using a non-dominated sorting multi-objective sparrow search algorithm. The results of this study demonstrate that the consideration of design uncertainty in the robust optimization of pulse correction projectiles leads to significant enhancements in both lateral correction ability and range while satisfying flight stability requirements. Moreover, when compared to deterministic optimization, the performance variability of the design is markedly improved. This research methodology provides valuable insights for optimizing the performance of pulse correction projectiles.

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Optimization of the aerodynamic configuration of a tubular projectile based on blind Kriging

Cited by 2 publications

References 11 publications

Investigating the effect of train speed and ground clearance on aerodynamics of a simplified high-speed train

Investigating the effect of train speed and ground clearance on aerodynamics of a simplified high-speed train

Robust Optimization Design of the Aerodynamic Shape and External Ballistics of a Pulse Trajectory Correction Projectile

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