This thesis presents an investigation of the performance and efficiency of atwin-lobe Roots blower through the utilization of numerical simulations andComputational Fluid Dynamics (CFD). Compressors like these are used invarious industrial applications, especially in areas where moderate pressureratios and high volume flow rates are of interest.The primary objective of this study was to analyze the performancecharacteristics of simulated Roots blower data and compare it to lab-acquiredexperimental data of a real-life model. Since an actual view of the flow fieldinside the pump housing is difficult to obtain, the use of CFD could be a wayof visualizing the internal workings of the pump if integral parameters such asmass flow can be verified. This study serves as a first step toward this goal ofcapturing the complex fluid dynamics inside the blower.Several simulations were conducted, systematically varying factors likepressure ratio and rotational speed to evaluate their impact on the blowerperformance in terms of efficiency and similarity to the experimental data. Theresults obtained from the simulations were similar between the experimentaland the numerical test cases in the lower half of the investigated RPM range.At higher revolutions rates the discrepancies grew larger due to simplifiedconditions such as adiabatic walls of the pump housing that prevented coolingof the heated air.In conclusion, this study provided useful insight into the advantages andlimitations of the applied CFD software, Ansys Forte.