摘要
采用分次、定量、定压装填微气体单芯延期体,测定压药压强与装药密度以及装药密度与燃速及燃速相对极差的关系。得出在压药压强为50-650 MPa范围内,对应装药密度变化为2.73-3.51 g/cm,同一压强下密度波动小;在密度为2.73-3.51 g/cm3时,对应燃速变化为8.9-17.1cm/s,燃速相对极差变化为49%-3.6%。在装药密度≤3.1 g/cm3时,燃速相对极差随密度变化较快,装药密度>3.1 g/cm3时,燃速相对极差随密度增加趋于稳定,最高精度达3.6%。在装药密度较低时,如<2.85 g/cm3,对应压药压强<100 MPa,燃速散布较大,延期精度低。
The gasless delay composition was loaded into a single core delay elements quantificationally and pressed at a desired pressure in many small increments. The charging density loaded in the element and at different pressure was measured as well as the burning rate and relative rang of it at different charging density. The results show that powder loading pressure in the range between 50 MPa to 650 MPa makes the change of the density from 2. 73 g / cm3 to 3. 51 g / cm3,and at the same loading pressure the charging density fluctuates tinily. Charge density in the range between 2. 73 g / cm3 to 3. 51 g / cm3 makes the change of burning rate from 8. 9 cm / s to 17. 1 cm / s and the relative range from 49 % to 3. 6 % accordingly. When the charging density ρ≤3. 1 g / cm3,the relative range of the burning rate changes rapidly with charging density,while ρ > 3. 1 g / cm3,the relative range of the burning rate tends to stability with the charging density and reachs up to the highest. The lower charging density,such as 2. 85 g / cm3 and corresponding to loading pressure below 100 MPa,the larger scattering of the burning rate,and so the lower of the delay precision.
出处
《煤炭技术》
CAS
北大核心
2014年第11期282-284,共3页
Coal Technology
基金
国家自然科学基金-煤炭联合基金重点项目(51134012)
关键词
燃烧学
延期精度
燃速
装药密度
微气体延期药
combustion
delay precision
burning rate
charging density
gasless delay composition
