Numerical investigation into effects on momentum thrust by nozzle's geometric parameters in water jet propulsion system of autonomous underwater vehicles

Jiang, Liang; Li, Xiwen; Zhang, Zuti; Luo, Xiaohui; Zhu, Yuquan

doi:10.1016/j.oceaneng.2016.07.041

Cited by 21 publications

(12 citation statements)

References 24 publications

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“…It is often referred to as the cross-combination of thrusts [8]; -the presence of cavitation for heavy loads on propellers (intake of air) leads to the decrease in pressure on the propeller blades and can occur at low immersion of the propeller due to the motion of ship across the waves [9]; -extreme conditions with large amplitudes of the motion of the ship perpendicular to the surface of water leads to the sudden drop in thrust and torque with the hysteresis effect [10]; -simultaneous reduction of thrust and reverse thrust can occur due to the interaction between the flow from SP and the hull, caused by the effects of pressure, when the small thrust of SP passes along the hull. This is referred to as the Coanda effect [11][12][13];…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Formalization of design for physical model of the azimuth thruster with two degrees of freedom by computational fluid dynamics methods

Budashko

2017

EEJET

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Formalization of design for physical model of the azimuth thruster with two degrees of freedom by computational fluid dynamics methods

Budashko

2017

EEJET

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“…Investigation of the hydrodynamic performance of AUV has substantial significance in the design of AUV. Several experimental and numerical studies are available in the literature in which the evolution of hydrodynamic coefficients over AUV hulls were studied to better understand the hydrodynamic forces and moments acting on the AUV under various conditions [2,3,4,5,6,7,8,9,10,11,12]. Jagadees et al [2] made experimental analysis of hydrodynamic force coefficients at different angle of attacks and Reynolds numbers over the standard hull form.…”

Section: Introductionmentioning

confidence: 99%

The effects of free stream turbulence on the hydrodynamic characteristics of an AUV hull form

2019

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This article presents experimental and numerical studies on the effect of free stream turbulence on evolution of flow over an autonomous underwater vehicle (AUV) hull form at three Reynolds numbers with different submergence depths and angles of attack. The experiments were conducted in a recirculating water tank and the instantaneous velocity profiles were recorded along the AUV using Acoustic Doppler Velocimetry (ADV). The experimental results of stream-wise mean velocity, turbulent kinetic energy(TKE) and Reynolds stresses were used to validate the predictive capability of a Reynolds stress model (RSM) with the wall reflection term of the pressure strain correlation. From the high fidelity RSM based simulations it is observed that in presence of free stream turbulence, the pressure, skin friction, drag and lift coefficients decrease on the AUV hull.The variation of the hydrodynamic coefficients were also plotted along the AUV hull for different values of submergence depth and angle of attack with different levels of free stream turbulence. The conclusions from this experimental and numerical investigation give guidance for improved design paradigms for the design of AUVs.

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“…6,7 For the water jet propulsion system of autonomous underwater vehicles (AUVs), the conical nozzles can effectively suppress the onset of cavitation compared to the cylindrical nozzles. 2,8,9 In order to reveal the effect of geometric parameters on the energy conversion efficiency of water jet propulsion system of AUVs, it is necessary to study the effects of geometric parameters of conical nozzles on the flow and cavitation characteristics.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of effects of geometric parameters on the flow and cavitation characteristics inside conical nozzle of autonomous underwater vehicles

Wang

Jiang²,

Huo

2019

Advances in Mechanical Engineering

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The geometric parameters (ratio of orifice's length to diameter, conical angle, and inner-wall roughness) of conical nozzle are investigated via computational fluid dynamic method to reveal the effect on the flow and cavitation characteristics. The variation of geometric parameters affects the distribution of the static pressure and the drag force, which in turn affects the mass flow rate at the outlet. The results indicate that the conical angle plays a dominant role in effecting the flow and cavitation characteristics. The higher the intensity of cavitation, the more notable the effect of geometric parameters on cavitation characteristics.

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Numerical investigation into effects on momentum thrust by nozzle's geometric parameters in water jet propulsion system of autonomous underwater vehicles

Cited by 21 publications

References 24 publications

Formalization of design for physical model of the azimuth thruster with two degrees of freedom by computational fluid dynamics methods

Formalization of design for physical model of the azimuth thruster with two degrees of freedom by computational fluid dynamics methods

The effects of free stream turbulence on the hydrodynamic characteristics of an AUV hull form

Numerical study of effects of geometric parameters on the flow and cavitation characteristics inside conical nozzle of autonomous underwater vehicles

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