Aerated stirred tank reactors still find widespread use in industries connected to chemical and biochemical engineering today due to their simple operating mode, low investment costs and flexibility. For a variety of applications in these different fields, efficient mixing of two phase flows with high heat- and mass transfer performance is one of the most important challenges [Mid04]. Because of the significance of these apparatuses they have been investigated intensively in the past decades to model and simulate these processes.
Reliable design and scale-up remain a challenging task with many unanswered questions. To expand available data on large scale reactors, a large scale acrylic glass reactor with a volume of VR = 15 m3 and total optical access has been erected at Hamburg University of Technology together with Boehringer Ingelheim Pharma GmbH & Co.KG. The measuring equipment to conduct the experiments in this reactor is supplied by the Institute of Multiphase Flows. The project primarily aims at an improved understanding of the process. Based on this, a better modelling of scale-up and transfer between different systems can be developed. An essential component is the precise and comprehensive determination of the mass transfer rate, the power input and the flow pattern as a function of the operating parameters.