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An improved design method and experimental performance of two dimensional curved wall diffusers
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Yang, T. El-Nashar, A. M. Hudson, W. G. |
| Copyright Year | 1972 |
| Description | A computer design program was developed to incorporate the suction slots in solving the potential flow equations with prescribed boundary conditions. Using the contour generated from this program two Griffith diffusers were tested having area ratios AR = 3 and 4. The inlet Reynolds number ranged from 600,000 to 7 million. It was found that the slot suction required for metastable operation depends on the sidewall suction applied. Values of slot suction of 8% of the inlet flow rate was required for AR = 4 with metastable condition, provided that enough sidewall suction was applied. For AR = 3, the values of slot suction was about 25% lower than those required for AR = 4. For nearly all unseparated test runs, the effectiveness was 100% and the exit flow was uniform. In addition to the Griffith diffusers, dump and cusp diffusers of comparable area ratios were built and tested. The results obtained from these diffusers were compared with those of the Griffith diffusers. Flow separation occurred in all test runs with the dump and cusp diffusers. |
| File Size | 4439410 |
| Page Count | 77 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19730003567 |
| Archival Resource Key | ark:/13960/t8bg7fn3x |
| Language | English |
| Publisher Date | 1972-11-20 |
| Access Restriction | Open |
| Subject Keyword | Fluid Mechanics Suction Flow Velocity Boundary Conditions Diffusers Boundary Layer Control Walls Computer Aided Design Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
