گرجی, محمود

[ 1 ] - تعیین ضریب نفوذ و تغییرات غلظت سوخت هیدروکربنی در سوخت آمینی(علمی-ترویجی)

In a motor with a liquid hydrocarbon fuel, the hydrocarbon fuel diffuses into the amine fuel and the fuel concentration changes with time. Therefore, the variation of amine fuel at each time should be predicted to ensure the safe start of the motor and the fuel storage should be recharged if the amine fuel concentration is out of specific range. In this work, the amount of hydrocarbon fuel diff...

[ 2 ] - بررسی تجربی حلالیت و خنثی سازی بخارهای سوخت JPX (علمی-پژوهشی)

JPX rocket fuel is a mixture of 1,1-dimethyl hydrazine and a nearly light hydrocarbon fuel. Regard to the presence of 1,1-dimethyl hydrazine in the fuel, emission of dimethyl hydrazine vapors in atmosphere during fuel charging can be hazardous. On the other hand, after the fuel charging, the internal surface of pipline and related equipments is wetted with the fuel. This fuel is hazardous from ...

[ 3 ] - بررسی عوامل موثر بر ماندگاری سوخت‌ دی متیل هیدرازین نامتقارن

One of the difficulties of the liquid fuels is theirs shelf life because these fuels like other chemical materials become off spec after a period of time due to the tendency to the destructive reactions. This variation in fuel spec affects the chemical and physical properties of fuel and therefore the combustion performance. This subject is significant because of need to long time storage of fu...

[ 4 ] - کالیبراسیون و صحه‌گذاری دستگاه دیافراگم سل برای اندازه‌گیری ضریب نفوذ مایعات

In simulation and modeling of mass transfer phenomena and design of separation equipment; and prediction of mass transfer in miscible fuels, it is necessary to have the mass transfer coefficients. In this work, a diaphragm- cell was manufactured to measure the liquid-liquid diffusion coefficient. Then the cell constant was obtained to be 0.188 cm-2 with 0.5 molar solution of potassium chloride ...

[ 5 ] - کاربرد روش اندیس شدت واکنش برای پیش‌بینی زمان ماندگاری سوخت مایع

Due to prolonged storage time of fuel, recognizing the effective parameters on fuel degradation and its shelf life prediction is important. Regard to need of using a reliable and efficient accelerated ageing method for prediction of fuel shelf life, introducing an efficient approach is necessary for this purpose. Most of the researches done in this area are limited to Arrhenius classical approa...

[ 6 ] - پیش بینی زمان ماندگاری سوخت مایع در شرایط غیر همدما با استفاده از اندیس شدت واکنش

Shelf life prediction for liquid fuels depends on a reliable and efficient accelerated ageing method. Most of the available researches in this area are limited to isothermal ageing. Therefore, these isothermal ageing methods are not capable to predict shelf life for fuels at non-isothermal ageing conditions. In the previous work, a new approach called reaction severity index was proposed for t...

[ 7 ] - پیش بینی زمان ماندگاری سوخت هیدروکربنی

Recognizing the effective parameters on liquid fuel degradation and its shelf life prediction is an important issue. Most of the researches done in this area are limited to synthetic fuels. In this work, the shelf life of hydrocarbon fuel and the effect of vessel material, blanketing gas and vessel temperature on the amount of generated gum in the fuel have been investigated. The results showed...