Investigation of the detonability of high energy density materials and its-based propellants

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K22430
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0303:Civil engineering, social systems engineering, safety engineering, disaster prevention engineering, and related fields
• Research Institution: Nagoya University
• Principal Investigator: Itouyama Noboru 名古屋大学, 未来材料・システム研究所, 特任助教 (50881215)
• Project Period (FY): 2020-09-11 – 2022-03-31
• Keywords: 高エネルギー物質 / 気相デトネーション / 反応速度論 / 推進剤

Outline of Final Research Achievements

The study focused on the detonation as a potential hazard with significant risk to ensure high handling performance for ammonium dinitramide (ADN) which is an energetic material and an ADN-based high energy density propellant, ADN-EILPs, and aimed to understand the basic gas-phase detonation characteristics of these materials. The initial conditions of ADN and ADN-EILPs decomposition gases were computationally verified and their compositions were found to change depending on the pressure environment. The 0D and 1D reaction simulations were performed to clarify the possible gas-phase detonation characteristics of ADN and ADN-EILPs decomposition gases, and to understand the detonation characteristics of ADN-EILPs, which are considered to have lower energy sensitivity in the solid-liquid state. It is suggested that ADN-EILPs, which is considered to have lower energy sensitivity in the solid-liquid state, has higher gas-phase detonability than ADN.

Free Research Field

安全工学

Academic Significance and Societal Importance of the Research Achievements

本研究の成果は昨今利用拡大や新規開発が進む高エネルギー物質（特にADN）とその推進剤に対して随伴する取扱時の安全性確保に資するものである．特に，ADNは単体では衝撃・摩擦といった外的エネルギに対して非常に感度が高い反面、イオン液体化させたADN-EILPsではこれらが鈍化するため，高いエネルギー密度と高い取扱性の両立が可能であるという関係がこれまで知られていた．しかしながら本研究が指し示した気相爆轟特性の関係は，これに反する結果となり，取扱時の最小化を目指すにあたり，ハザードシナリオのさらなる拡大の必要性が示唆された．また，本研究で得られた知見は他のADN系推進剤にも十分応用可能なものである．