Presentation Title

Modeling the Capstone C65 turbo-engine

Faculty Mentor

Timothy Usher, Kurt Kloesel

Start Date

17-11-2018 8:30 AM

End Date

17-11-2018 10:30 AM

Location

HARBESON 33

Session

POSTER 1

Type of Presentation

Poster

Subject Area

engineering_computer_science

Abstract

Numerical Propulsion Simulation Software (NPSS) is a National Aeronautics and Space Administration (NASA) developed thermodynamic simulator that is capable of accurately modeling both steady state and transient solutions of turbo-generator engines. NPSS can execute predictive iterative simulations that can quickly determine the feasibility of a prospective build and the relevant crucial testing states. A 65kW turbo-generator was connected to a 200kW loadbank and data, such as fuel flow, air flow, temperatures, turbogenerator power output, and shaft speed, were collected. The engine was recreated in NPSS by including necessary elements such as the compressor, turbine, generator, combustion chamber, recuperator, and central shaft and linking the components via a network of inlet and outlet ports. On-design and off-design cases were run in NPSS and compared to experimental data to evaluate the validity of the model. Turbo-generator efficiency, power output, shaft speed, turbine exit temperature, and mass flow were the variables chosen to determine the effectiveness of the model. Results of steady-state modeling are very promising with engine efficiency discrepancies within acceptable error over the stable condition domain (30kW ~ 58kW) and negligible mass flow error within the same power interval. The level of agreement between the model data and experimental data shows the model is ready to be run under transient conditions. Future work will include running the model under transient conditions and integrating the model into Matlab/Simulink.

Summary of research results to be presented

Results of steady-state modeling are very promising with engine efficiency discrepancies within acceptable error over the stable condition domain (30kW ~ 58kW) and negligible mass flow error within the same power interval. The level of agreement between the model data and experimental data shows the model is ready to be run under transient conditions. Future work will include running the model under transient conditions and integrating the model into Matlab/Simulink.

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Nov 17th, 8:30 AM Nov 17th, 10:30 AM

Modeling the Capstone C65 turbo-engine

HARBESON 33

Numerical Propulsion Simulation Software (NPSS) is a National Aeronautics and Space Administration (NASA) developed thermodynamic simulator that is capable of accurately modeling both steady state and transient solutions of turbo-generator engines. NPSS can execute predictive iterative simulations that can quickly determine the feasibility of a prospective build and the relevant crucial testing states. A 65kW turbo-generator was connected to a 200kW loadbank and data, such as fuel flow, air flow, temperatures, turbogenerator power output, and shaft speed, were collected. The engine was recreated in NPSS by including necessary elements such as the compressor, turbine, generator, combustion chamber, recuperator, and central shaft and linking the components via a network of inlet and outlet ports. On-design and off-design cases were run in NPSS and compared to experimental data to evaluate the validity of the model. Turbo-generator efficiency, power output, shaft speed, turbine exit temperature, and mass flow were the variables chosen to determine the effectiveness of the model. Results of steady-state modeling are very promising with engine efficiency discrepancies within acceptable error over the stable condition domain (30kW ~ 58kW) and negligible mass flow error within the same power interval. The level of agreement between the model data and experimental data shows the model is ready to be run under transient conditions. Future work will include running the model under transient conditions and integrating the model into Matlab/Simulink.