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Study and Numerical Simulation of Unconventional Engine Technology

Shekhar, Anjali
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1544098607675961

Abstract Details

2018, MS, University of Cincinnati, Engineering and Applied Science: Aerospace Engineering.
The aim of this thesis is to understand the working of two unconventional aircraft propulsion systems and to setup a two-dimensional transient simulation to analyze its operational mechanism. The air traffic has nearly increased by about 40% in past three decades and calls for alternative propulsion techniques to replace or support the current traditional propulsion methodology. In the light of current demand, the thesis draws motivation from renewed interest in two non-conventional propulsion techniques designed in the past and had not been given due importance due to various flaws/drawbacks associated. The thesis emphasizes on the working of Von Ohains thermal compression engine and pulsejet combustors. Computational Fluid Dynamics is used in current study as it offers very high flexibility and can be modified easily to incorporate the required changes. Thermal Compression engine is a design suggested by Von Ohain in 1948. The engine works on the principle of pressure rise caused inside the engine which completely depends on the temperature of working fluid and independent of rotations per minute. The design data has been provided for turbo-prop and turbo-jet engines, in the current study the design data for turbo-prop engine is used and geometric optimization study is conducted to obtain the required dimensions to setup a two-dimensional engine unit. The suggested RPM value is used to calculate the time required to complete the process. The simulation is conducted and the results of simulation are verified using the basic thermodynamic equations. The vital parameters of the engine such as the thermal efficiency, energy output and thrust are calculated. A brief analysis of the performance is conducted to decide the application of this engine in current scenario. The similarities of the engine operation is compared to currently tested pressure gain devices. In the next research topic, Pulsejet combustor simulation study is set up by considering three different geometries. The dimensions of the combustion chamber are fixed, the tailpipe being short, medium and long are considered for the study. The simulation is designed to capture the pressure, temperature and the location of auto ignition. The results obtained from the simulation in current study are compared with the experimental results obtained from a separate study. The peak pressure, the pressure variation along then pulsejet, the location of auto ignition and the frequency of operation of each configuration is compared with experiment results and the observation is presented. The simulation is used to study the reasons for auto ignition, which is in turn used to establish a standard mechanism of operation for pulsejets. The results are also used to study the behavior of pulsejets with variation in geometry.
Ephraim Gutmark, Ph.D. (Committee Chair)
Shaaban Abdallah, Ph.D. (Committee Member)
Mark Turner, Sc.D. (Committee Member)
107 p.
Aerospace Materials
Aircraft Propulsion; Computational Fluid Dynamics; Pressure Gain Combustion; Pulsejets; Transient Simulation

Recommended Citations

Citations

  • Shekhar, A. (2018). Study and Numerical Simulation of Unconventional Engine Technology [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1544098607675961

    APA Style (7th edition)

  • Shekhar, Anjali. Study and Numerical Simulation of Unconventional Engine Technology. 2018. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1544098607675961.

    MLA Style (8th edition)

  • Shekhar, Anjali. "Study and Numerical Simulation of Unconventional Engine Technology." Master's thesis, University of Cincinnati, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1544098607675961

    Chicago Manual of Style (17th edition)

ucin1544098607675961
768
© 2018, some rights reserved.Creative Commons License Study and Numerical Simulation of Unconventional Engine Technology by Anjali Shekhar is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Cincinnati and OhioLINK.