APPLYING A DSMC SOLVER TO EXPLORE THE EFFECTS OF HEATER PLATES/WALL HEATING IN MICROTHRUSTER

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PARHIZKAR HAMIDREZA; EBRAHIMI ASGHAR; LEKZIAN ELYAS

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Journal: Modares Mechanical Engineering Year:2017 | Volume:16 | Issue:11 Page(s): 123-134

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Title

APPLYING A DSMC SOLVER TO EXPLORE THE EFFECTS OF HEATER PLATES/WALL HEATING IN MICROTHRUSTER

Author(s)

PARHIZKAR HAMIDREZA | EBRAHIMI ASGHAR | LEKZIAN ELYAS | Issue Writer Certificate

Keywords

DSMC SOLVERQ1

WALL HEATING AND HEATER PLATESQ1

LOCAL KNUDSEN NUMBERQ1

MICROTHRUSTER THRUST AND SPECIFIC IMPULSEQ1

SENSITIVITY ANALYSISQ1

Abstract

In the present paper, a DSMC SOLVER is utilized to study the effects of wall heating/heater plates on performance parameters of microthruster systems. The solver uses LOCAL KNUDSEN NUMBER based on the gradient of flow properties to distinguish the molecular and continuum region. This solver uses theory of characterisitcs for determination of inlet and outlet boundary conditions. Proper cell dimensions, number of particles per cell, and grid study are carried out to guarantee the accuracy of simulations.Three typical micropropulsion systems are studied. All three systems have a microchannel and a converging-diverging micronozzle. The first type is cold gas micropropulsion system, the second type is a microthruster with wall heated channel, the third type is microthruster with heater plates inside. The first type is considered as reference case and two other systems are compared with type1. It is observed that heating the walls in microthruster type2 accelerates the flow and increases the specific impulse of the system. In micropropulsion device type3, heater plates increase downstream temperature of convergent-divergent nozzle and also elevate the specific impulse. Due to considerable mass flow rate decrease of system type3, its thrust is decreased whereas mass flow rate of system type2 is not decreased as much as type3 and therefore the thrust of microthruster type2 is more than type1 and type3. Hence the second microprolusion system configuration has higher performance parameters in comparison with two other systems. It is also observed that increasing wall temperature in microthruster type2 decreases the thrust and specific impulse sensitivity to temperature increase.

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APA: Copy

PARHIZKAR, HAMIDREZA, EBRAHIMI, ASGHAR, & LEKZIAN, ELYAS. (2017). APPLYING A DSMC SOLVER TO EXPLORE THE EFFECTS OF HEATER PLATES/WALL HEATING IN MICROTHRUSTER. MODARES MECHANICAL ENGINEERING, 16(11 ), 123-134. SID. https://sid.ir/paper/178935/en

Vancouver: Copy

PARHIZKAR HAMIDREZA, EBRAHIMI ASGHAR, LEKZIAN ELYAS. APPLYING A DSMC SOLVER TO EXPLORE THE EFFECTS OF HEATER PLATES/WALL HEATING IN MICROTHRUSTER. MODARES MECHANICAL ENGINEERING[Internet]. 2017;16(11 ):123-134. Available from: https://sid.ir/paper/178935/en

IEEE: Copy

HAMIDREZA PARHIZKAR, ASGHAR EBRAHIMI, and ELYAS LEKZIAN, “APPLYING A DSMC SOLVER TO EXPLORE THE EFFECTS OF HEATER PLATES/WALL HEATING IN MICROTHRUSTER,” MODARES MECHANICAL ENGINEERING, vol. 16, no. 11 , pp. 123–134, 2017, [Online]. Available: https://sid.ir/paper/178935/en

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