Interior Perforation Flow Field Study of Partially Cut 7-Perforated Stick Propellants

• Autorzy: Zhao Xiaoliang , Zhang Xiaobing

Identyfikatory

DOI

10.22211/cejem/115262

• Języki publikacji: EN

Abstrakty

EN

Partially cut 7-perforated propellants are used in gun charges because of their good flame spreading, high progressivity and loading density. To investigate the complex flow field in a partially cut multi-perforation stick propellant, a steady three-dimensional model for compressible viscid internal perforation and the vent gas region flow field was established and simulated by ANSYS Fluent. The results illustrate that the cut vent can decrease the internal perforation pressure and end face gas velocity. Moreover, the mass that escaped through the vent to the outside was 85.3% of the whole internal burning propellant gas. When the width of the cut slot was larger than half the diameter, the internal pressure decreased weakly and the progressive intensity decreased slightly as the cut slot was increased. As the same side intervals were increased or the perforation diameters were decreased, the end face gas velocity and the internal and external perforation pressure differences increased, and the propellant combustion area progressive intensity increased. As the web thickness increased, the internal pressure increased, and gas velocity exhibited an upward tendency and reached peak values when 2e1 = 0.84 mm, whilst the progressive intensity increased slightly.

Słowa kluczowe

EN

partially cut; 7-perforation stick propellants; internal perforation flow field; pressure difference; gas velocity

• Czasopismo: Central European Journal of Energetic Materials
• Rocznik: 2019
• Tom: Vol. 16, no. 4
• Strony: 564--582
• Opis fizyczny: Bibliogr. 16 poz., rys., tab.

Twórcy

autor

Zhao Xiaoliang

• Nanjing University of Science and Technology, China

autor

Zhang Xiaobing

• Nanjing University of Science and Technology, China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).