Experimental Study on Spray Characteristics of ADN/Water Based Gel Propellant with Impinging Jet Injectors

Wang, Feng‐Shan; Zhang, Tao; Guan, Hao-Sen; Li, Hong‐Meng

doi:10.1002/prep.202000001

Cited by 9 publications

(3 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[1][2][3][4][5][6][7][8][9][10] In order to reduce the water absorption and susceptibility of ADN, several studies have explored the modification of ADN by means of spherification, eutectic technology, and coating. [11][12][13][14][15][16][17][18][19][20] Among these methods, surface coating of ADN is an effective means for reducing its hygroscopicity and susceptibility. Ting et al 21 used alumina films to coat ADN and analyzed the samples using scanning electron microscopy (SEM) and water absorption measurement.…”

Section: Introductionmentioning

confidence: 99%

Preparation of low hygroscopicity ADN-based energetic composite microspheres and their performance study

Zhang

Huo

et al. 2023

AIP Advances

View full text Add to dashboard Cite

In order to reduce the hygroscopicity of ammonium dinitramide (ADN), four different ADN/nitrocellulose (NC) samples were prepared from acetone solutions using electrostatic spraying, with the concentrations of 2.5, 5, 7.5, and 10 mg ml−1. The morphology was analyzed by scanning electron microscopy, and the samples with regular morphology and uniform size were examined by x-ray powder diffraction and differential scanning calorimetry to investigate the crystal structure and obtain their thermal decomposition properties. Additionally, the mechanical sensitivity and hygroscopicity of the microspheres were also obtained from these studies. The ADN/NC energetic complexes prepared at a concentration of 5 mg ml−1 were found to be spherical, regular in shape, and uniform in size. The apparent activation energy and the critical temperature for thermal explosion were found to be reduced. The impact sensitivities were comparable to those of the raw material, whereas the friction sensitivities were enhanced. Water absorption tests showed that the moisture absorption of the raw ADN was 32.12%, and that of the ADN/NC sample after coating was 3.75%. The moisture absorption of the prepared samples was significantly reduced.

show abstract

Section: Introductionmentioning

confidence: 99%

Preparation of low hygroscopicity ADN-based energetic composite microspheres and their performance study

Zhang

Huo

et al. 2023

AIP Advances

View full text Add to dashboard Cite

show abstract

“…When the collision angle is 150 degrees, subcritical conditions often lead to off-axis collision. Wang et al [17] investigated the effect of different impingement angles, nozzle diameters, and injection pressures on the atomization properties of ADN/water-based gel propellants by taking spray images using a double-strand impact nozzle. It was found that an increase in the impact angle resulted in a decrease in the rupture length of the liquid lm and an increase in the spray cone angle.…”

Section: Introductionmentioning

confidence: 99%

Influence of Collision Angle Micro-deviation of Symmetric Nozzles on Collision Atomization Characteristics

Cui

Tan

2022

Preprint

View full text Add to dashboard Cite

The large-scale high-precision machining of the nozzles in the collision atomizer is quite difficult. The slight deviation of the nozzle inclination causes the collision angle to change doubly, which affects the collision position and the spatial distribution of the atomized droplets and reduces the combustion efficiency of the combustion chamber. In order to improve the atomization performance of the dual jet collision atomizer, this study firstly investigates the influence of the collision angle micro-deviation on the atomization characteristics based on the laser interference particle measurement technology (IPI). To jointly study the real-time characteristics of the internal flow and atomization field, a collision atomizer with transparent nozzles is independently designed, and the collision angle is controlled by a high-precision rotary stage. The cavitation phenomenon in the internal flow field is analyzed by simulation and experiment. The hydraulic parameters and atomization performance of the collision atomization field are measured and analyzed. The experimental results show that under the same injection pressure, the increase of the collision angle leads to the decrease of the Sauter Mean Diameter (SMD) and the increase of the atomization cone angle. Taking 60° as the benchmark, within the variation range of ± 5°, the collision angle deviation has little effect on the spatial distribution of atomized droplets.

show abstract

“…When the collision angle was 150 degrees, subcritical conditions often led to an off-axis collision. Wang et al [17] investigated the effect of different impingement angles, nozzle diameters, and injection pressures on the atomization properties of ADN/water-based gel propellants by taking spray images with a double-strand impact nozzle. They found that an increase in the impact angle resulted in a decrease in the rupture length of the liquid film and an increase in the spray cone angle.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Expression of a Slight Deviation of the Impact Angle in a Collision Atomizer

Cui

Tan

2022

Machines

View full text Add to dashboard Cite

In the processing of colliding atomizers, a small change in the inclination of each orifice will double the impact angle, seriously affecting its atomization performance. In this paper, the influence of slight impact angle deviation on atomization performance was studied in steps of 1°, quantitatively, for the first time. The cavitation effect of the flow field was combined with the shape and parameters of the atomization field. FLUENT was used to simulate the internal flow field, and an independently designed atomizer with transparent nozzles was used to detect the internal flow field in real time. The collision atomization experimental platform and the laser interference particle measurement platform were built independently, and the collision angle was adjusted through a high-precision rotating table to establish the relationship between collision-angle deviation (60° ± 5°) and the atomization field performance (Sauter mean diameter, atomization cone angle, and spatial distribution of droplets). The experimental results showed that under the same injection pressure, the increase in the collision angle led to an decrease in the Sauter mean diameter and an increase in the atomization cone angle. Taking 60° as the benchmark, the particle size distribution was concentrated at ~150 μm to 300 μm within the variation range of ±2°, and the peak positions were very similar.

show abstract

Experimental Study on Spray Characteristics of ADN/Water Based Gel Propellant with Impinging Jet Injectors

Cited by 9 publications

References 32 publications

Preparation of low hygroscopicity ADN-based energetic composite microspheres and their performance study

Preparation of low hygroscopicity ADN-based energetic composite microspheres and their performance study

Influence of Collision Angle Micro-deviation of Symmetric Nozzles on Collision Atomization Characteristics

Quantitative Expression of a Slight Deviation of the Impact Angle in a Collision Atomizer

Contact Info

Product

Resources

About