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Evaluation of a Combustion-Based Mesoscale Thermal Actuator in Open and Closed Operating Cycles

Department of Mechanical Engineering, Wichita State University, Wichita, KS 67260, USA
This paper has a preprints version which has been not sent for peer review.
Actuators 2019, 8(4), 73; https://doi.org/10.3390/act8040073
Received: 2 September 2019 / Revised: 19 October 2019 / Accepted: 19 October 2019 / Published: 23 October 2019
A combustion-based mesoscale thermal actuator is proposed and its performance is studied in both open and closed cycle operations using a physics-based lumped-parameter model. The actuator design is unique as it implements a free-piston complaint architecture where the piston is free to move in a linear direction. Our objective is to study the actuator behavior in both the cycles to help identify the benefits and highlight the differences between the two cycles. The actuator is modeled as a spring-mass-damper system by taking an air standard cycle approach. Three observations are reported: (1) for nominal heat inputs (140 J/cycle), the actuator can produce large displacement strokes (16 cm) that is suitable for driving mesoscale robots; (2) the efficiency of the actuator depends on the heat input; and (3) for a specific heat input, both the open and closed cycles operate differently—with different stroke lengths, peak pressures, and thermal efficiencies. Our study reveals that the performance metrics of the actuator make it an ideal candidate for high speed, large force, and large displacement stroke related applications. View Full-Text
Keywords: thermal actuator; compliant architecture; open and closed operating cycles; mesoscale thermal actuator; compliant architecture; open and closed operating cycles; mesoscale
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MDPI and ACS Style

Burugupally, S.P. Evaluation of a Combustion-Based Mesoscale Thermal Actuator in Open and Closed Operating Cycles. Actuators 2019, 8, 73. https://doi.org/10.3390/act8040073

AMA Style

Burugupally SP. Evaluation of a Combustion-Based Mesoscale Thermal Actuator in Open and Closed Operating Cycles. Actuators. 2019; 8(4):73. https://doi.org/10.3390/act8040073

Chicago/Turabian Style

Burugupally, Sindhu P. 2019. "Evaluation of a Combustion-Based Mesoscale Thermal Actuator in Open and Closed Operating Cycles" Actuators 8, no. 4: 73. https://doi.org/10.3390/act8040073

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