It can be found that the improved model, with proper parameters, can predict SDT in "similar" explosives and explain the effects of properties of component explosive materials, initial particle size, initial porosity, initial temperature and the loaded stress on the explosive detonation initiation.
On the basis of the statistics on the sandstone compositions, the quantitative calculation shows that mechanic compaction is the main cause for porosity loss and the next cementation, whereas the increase of secondary porosity resulted from the dissolution only accounts for less than 10% of the initial porosity.
On the basis of the statistics on the sandstone compositions,the quantitative calculation shows that mechanic compaction is the main cause for porosity loss and cementation comes second,whereas the increase of secondary porosity resulted from the dissolution only accounts for less than 10% of the initial porosity.
The diageneses suffered at difference regions were various, which causes the difference in porosity evolution. The reservoir petrophysical property in the north is better than that in the south. In other words, the estimated initial porosity of sandstones in the north part was 37 percent and decreased to 10.33 percent in stage B of late diagenesis;
(3) By using the new method put out in (2), Hugoniot data of no-porous samples of enstatite (Mg0.92,Fe0.08)SiO3 which initial density is 3.273g/m3, were reduced and the modified Hugoniot data shows very small dispersivity.
In addition, sedimentary facies, compaction and cementation are also responsible for primary porosity and reduction of intergranular pore-space of sandstones.
It was shown that the resulting material retains the initial porosity of the carrier and is selective in the separation of nucleic acids and proteins.
The photoluminescence and photoexcitation spectra of porous silicon films with an initial porosity of 50-60%, produced on single crystals of p-type silicon and subjected to anodic oxidation and chemical etching, are studied.
The distinctive features of the healing of pores in copper (with an initial porosity of 12%) by various types of static and shock-wave-induced stresses are discussed.
The average porosity loss was estimated to be approximately 2.7 % of the initial porosity per year, suggesting the long-term function of the permeable reactive barrier.
It is found that the electrical and mechanical properties are strongly affected by the initial porosity, the presence of hemihydrate or gypsum, and the fineness of cement.
Maximum densification is observed in PSi films with an original porosity of 15-50%.
Original porosity of the carbon was lost after combustion synthesis, and the loss of porosity due to combustion synthesis is attributed to the reaction between liquid titanium and carbon.
The effect of bronze original porosity and powder particle size on the wear resistance and friction coefficient of sintered carcasses impregnated with polymer and oil under dry friction conditions and a self-lubricating regime is established.
It is established that coating formation from the vapor phase hardly reduces the original porosity of carbon materials.
The stability of the properties of materials made of lanthanum chromite is determined primarily by their original porosity, and to a less degree by the content of free chromium oxide.
Significantly gas discovery is mode from the sandstone reservoirs of Penglaizhen formation (Upper Jurassic) with a burial depth of 1500 meters in western Sichuan depression. It's of great e-conomic value to the country. The petrography of Penglaizhen formation occurs as a red deposit iron-bearing sequence of shallow lacustrine and deltaic facies. The sandstone reservoirs have an average porosity of 15. 1% and permeability of 5. 7972 × 10-3μm2. The reservoir pore space has mainly been found as reduced intergranular...
Significantly gas discovery is mode from the sandstone reservoirs of Penglaizhen formation (Upper Jurassic) with a burial depth of 1500 meters in western Sichuan depression. It's of great e-conomic value to the country. The petrography of Penglaizhen formation occurs as a red deposit iron-bearing sequence of shallow lacustrine and deltaic facies. The sandstone reservoirs have an average porosity of 15. 1% and permeability of 5. 7972 × 10-3μm2. The reservoir pore space has mainly been found as reduced intergranular pores and secondary dissolution pores. This paper focuses on the contribution and forming mechanism of secondary porosity. Two forming mechanisms are considered: the carbonate cement dissolution caused by organic acid resulting from redox reaction when hydrocarbon migrated up from underlying upper Triassic source rock and reacted with oxidants (Fe2O3) in the sandstones. Another is the meteoric water leaching during the uplifting ofYansan middle epoch. In addition, sedimentary facies, compaction and cementation are also responsible for primary porosity and reduction of intergranular pore-space of sandstones.
Shock velocities in porous iron samples having different initial porosities have been measured using the pulse generation network. By combining the experimental data with complete compaction regime Hugoniot equations of porous iron, effects of initial porosities upon the shock attenuations in porous iron are studied.
Aim To study effects of the initial porosity on initial shock properties under explosion loads. Methods By combining classical detonation theory with shock Hugoniots of porous materials , a theoretical relationship between initial shock parameters and porosity was established. Results Effects of the initial porosity on theoretical initial shock properties are in good agreement with experimental results. Conclusion This theoretical model is effective for predicting the initial shock properties of porous materials...
Aim To study effects of the initial porosity on initial shock properties under explosion loads. Methods By combining classical detonation theory with shock Hugoniots of porous materials , a theoretical relationship between initial shock parameters and porosity was established. Results Effects of the initial porosity on theoretical initial shock properties are in good agreement with experimental results. Conclusion This theoretical model is effective for predicting the initial shock properties of porous materials under explosion loads .
初始孔隙度
initial porosity
查询“初始孔隙度”译词为用户自定义的双语例句
相关查询
2008 CNKI－中国知网