Fluids Analysis of the Thermal Micropump for a Fuel Atomizer

Ejection characteristics of micropumps for motorcycle fuel atomizer in high-temperature environment

“…For diagram of a thermal micropump fuel atomizer system and photo of the throttle body, see Cheng et al [20]. Thermal micropump fuel atomizer system was not installed on the engine, but on the upper end of the intake manifold and 20 cm away from the engine, so as to replace the traditional carburettor.…”

“…In the experiment, the pressure difference between the oil tank and the environment to where the work liquid ejected was 15.0 mm H 2 O [30]. After adjustment for CFD computation, the pressure difference between the micropump passageway entry and external air was 100 Pa [20,22]. Therefore, during the growing process of the bubble inside the thermal micropump, the temperature of the micropump was controlled at 300 K, and the ambient pressure was between 1.0 · 10 5 -1.01 · 10 5 Pa. Also, the measurement of the air temperature in the intake manifold of engine during the actual operation showed that the maximum temperature was 353 K. Therefore, the temperature of the external air to where the work liquid ejected was set to 300 K and 353 K in this study.…”

“…According to literature review [4][5][6]9,[16][17][18][19][20][21][22]32] and the limitation of the computational functions of CFD-ACE+ Ò [31], this study made the assumption that the interface between the vapor and liquid on the tip of bubble was leveled and had an area equal to the two-dimensional surface of the micropump cavity bottom. Based on Cheng et al [20,22] and Chen et al [32], the relationship between the growth of height and time when the bubble was formed inside the micropump cavity is as shown in Fig. 2 ing process.…”

“…These researches also included a lot of information concerning the potential of such micropumps in combustion engine applications or at higher ambient temperature or pressure. Cheng et al [16][17][18][19][20][21][22] [23][24][25][26][27][28][29][30] also published relevant patent documents and papers with regard to micropumps applied to a motorcycle's fuel atomizer system. This research intends to utilize CFD software CFD-ACE+ Ò [31] to analyze fluid characteristics of the thermal bubble micropump applied to a motorcycle fuel atomizer using ink and Stoddard solvent as the work liquids.…”

Toward an Electrolytic Micropump Actuator Design with Controlled Cyclic Bubble Growth and Recombination

“…Micropump applications are numerous and include implantable drug delivery (1,2), micro total analysis systems (3), reagent delivery in fuel cells (4), microelectronics cooling (5), micro power systems (6), and fuel injection in internal combustion engines (7). Of these, in-vivo drug delivery may have the most stringent constraints, requiring precise drug dosing, low power consumption, operation against moderate back pressures, high reliability, and minimal control complexity.…”