Unmanned underwater vehicles (UUVs) have become an increasingly important area of concern for global underwater equipment development due to their compact size, light weight, wide operating range, and low cost of use. [1,2]. Unmanned underwater vehicles with autonomous attack capabilities outperform current underwater combat equipment and can be used with existing underwater attack weapons.The challenges of launching small, lightweight UUVs for detection and communications missions have become an obstacle to creating new UUVs [3]requires launcher optimization.
Liu, HJ et al. used multiphase VOF model and traditional k-epsilon turbulence model. [4] The gravity effect of launch velocity on the hydrodynamic properties of an underwater vehicle launched vertically using an air curtain is studied. Numerical simulations are used to examine the link between the shape of an underwater vehicle and its launch speed. Zhang, JH et al. [5] A visual experiment platform and a two-dimensional (2D) transient model are used to predict the multiphase flow field during underwater launch. The researchers studied how muzzle velocity affects the flow field. The results show that although the length of the pressure oscillation decreases, the highest peak pressure of the oscillation increases with increasing muzzle velocity. Gao, S. et al. [6] The vortex structure and trajectory parameters of the underwater launch vehicle wake are studied using enhanced delayed separation eddy simulation, VOF multiphase flow model, and overlapping grid method. Zhang X et al. established a three-dimensional unsteady multiphase flow numerical model. [7] Sealed firing for underwater guns. The VOF multiphase flow model was selected and integrated with the Schnerr-Sauer cavitation model. The muzzle flow field of a 30 mm underwater gun with two tubes fired side by side was numerically calculated and compared with the results of a single tube fired. Li, WN et al. [8] A two-way fluid-structure interaction numerical simulation technique was created to examine the flow characteristics and dynamic response of the launch tube. Additional discussion is given on the effects of launch depth and side currents. Wang, YN et al. examined three samples of turbulence models: Reynolds stress model (RSM), large eddy simulation (LES) model, and normalized group (RNG) k-epsilon model. [9] Combined with VOF simulation. A volume of fluid (VOF) multiphase model was chosen to study the bubbly flow hydrodynamics in a top-immersed gunboat. In order to study the hydrodynamic characteristics and launch parameters during the entire launch process, Zhang Wenqing and others studied the hydrodynamic characteristics and launch parameters during the entire launch process. [10] A computational fluid dynamics (CFD) model of the AUV launch tube system was created. The results show how efficiently an underwater vehicle launch tube can operate with a turbine pump as the power input. Zhang Xiaowei and others built an underwater air curtain shooting simulation experimental platform. [11]Based on the gas jet theory and internal ballistic theory in water, a mathematical model of underwater air curtain launch was established, and the underwater artillery launch process was predicted. Jayaprakash et al. [12] A combination of experiments and CFD is used to study the evolution rules of underwater bubble generation, expansion and contraction. For the study of transmitters, Wei et al. [13] A scalable underwater launch system based on stress wave theory and split Hopkinson pressure rod technology was developed, which can be used to study cavitation phenomena and hydrodynamic properties of high-speed underwater objects.
It can be seen from the above that most academic research on underwater launch focuses on heavy weapons such as submarine-launched missiles and torpedoes, while there is little research on the underwater launch process of micro-robots and related launch systems. . Most current research involves launching missiles and torpedoes that typically range in size from 500 to 2,000 millimeters in diameter, 3,500 to 13,000 millimeters in length, and 160 to 1,500 kilograms in mass. The project length for this study is 400 mm and the diameter is 100 mm. This work will create an endoballistic model of a microrobotic launcher and optimize launcher parameters using particle swarm technology, given the variables that influence internal ballistic performance.