The results presented in this thesis describe multi-scale grid generated turbulence in an internal flow setting. Multi-scale grids offer benefits found in both passive and active grids -- they can be used to generate high turbulence intensities, but do not require active control. Various grid geometries found in literature as well as new geometries were created. Experiments were performed at the Hessert Aerospace Lab. The test set-up consisted of flow between two flat plates separated by a distance of 8.73 cm. Single- and dual-wire hotwire probes were used to acquire time series of velocity downstream of the grids. Multi-scale grid geometries commonly found in literature were tested in the internal flow regime to determine which geometries generated high turbulence intensities that were also spatially homogeneous. New geometries were created based on these results, and finally turbulence created using two of the grids was studied extensively using a dual-wire hotwire probe.