Advanced SearchSearch Tips
An Experimental Study on Startup Characteristics of a Center Body Diffuser for High Altitude Simulation
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
An Experimental Study on Startup Characteristics of a Center Body Diffuser for High Altitude Simulation
Yeon, Hae In; You, Isang; Kim, Wan Chan; Im, Ji Nyeong; Ko, Young Sung;
  PDF(new window)
An experimental study has been conducted to verify the startup characteristic of a Center Body Diffuser (CBD) for simulating a low pressure environment when at high altitudes. Vacuum chamber pressure and startup characteristics of the CBD were investigated according to various geometries of the center body structure by a cold gas flow test. The test results show that the startup pressure is lowest when the center body contraction angle is approximately . The startup characteristic of the CBDs significantly improves when the diffuser inlet length () is decreasing and the divergence length () is increasing. Additionally, it is possible to simulate various high altitude, low pressure conditions for various rocket engines that have different nozzle expansion ratios by adjusting the center body`s position inside the diffuser.
Center Body Diffuser;High Altitude Environment Simulation;Supersonic Exhaust Diffuser;Vacuum Chamber;
 Cited by
Kim, J. R. and Kim, J.-S., 2014, "Numerical Study for Design of Center-body Diffuser," Journal of the Korean Society of Propulsion Engineers, Vol. 18, No. 3, pp. 34-39.

Stinnett, W.D, 1965, "Center Body Diffuser Study," Aec-Nasa Space Nuclear Propulsion Office, Report No. RN-S-0243.

Schafer, K., Zimmermann, H. and Kruhsel, G., 2003, "Altitude Simulation Bench for VINCI Engine," 39th AIAA Joint Propulsion Conference and Exhibit 20-23, AIAA No. 2003-5043.

Edwards, Daryl A., 2007, "Proposed Facility Modifications to support Propulsion System Testing under Simulated Space Conditions at Plum Brook Station's Spacecraft Propulsion Research Facility (B-2)," Thermal and Fluid Analysis Workshop, Cleveland, OH, United States, TFAWS, Vol. 20007, pp. 10-14.

Hale, J.W. and Gobbell, W.C., 1966, "Diffuser Auxiliary Ejector Development for The Design of The J-3 LEM Descent Exhaust System," Arnold Engineering Development Center Arnold AFB TN, No. AEDC-TR-65-255.

Chamberlain, J. and Olson, Rober E., 1960, "Development of an Exhaust Diffuser for Ground Testing Rocket Engines," Liquid Rocket and Propellants, American Rocket Society, pp. 99-118.

Jeon, J. S., Kim, W. C., Yeoun, H. I., Kim M. S., Ko, Y. S. and Han, Y. M., 2014, "An Experimental Study on Performance of Second Throat Exhaust Diffusers of Different Configuration," Trans. Korean Soc. Mech. Eng. B, Vol. 38, No. 4, pp. 279-288. crossref(new window)

Park, J. H., Jeon, J. S., Yu, I. S., Ko, Y. S., Kim, S. J., Kim, Y. and Han, Y. M., 2011, "Performance Characteristics of Secondary Throat Supersonic Exhaust Diffusers," KSPE Fall Conference, pp. 641-644.

Kim, J. H., Yeoun, H. I., Kim, M. S., Jeon, J. S., Ko, Y. S. and Kim, S. H., 2012, "An Experomental Study on Performance of Second Throat Exhaust Diffuser according to Diameter of Second Throat," KSPE Fall Conference, pp. 871-874.

Annamalai, K., Visvanathan, K., Sriramulu, V. and Bhaskaran, K. A., 1998, "Evaluation of the Performance of Supersonic Exhaust Diffuser Using Scaled Down Models," Experimental Thermal and Fluid Science, Vol. 17, pp. 217-229. crossref(new window)

Annamalai, K., Satyanarayana, T., Sriramulu, V. and Bhaskaran, K. A., 2000, "Development of Design Methods for Short Cylindrical Supersonic Exhaust Diffuser," Experiment in Fluids, Vol. 29, pp. 305-308. crossref(new window)

James, E. A. J. and Theo, G. K., 2006, "Gas Dynamics," Pearson Prentice Hall.

John, D. A., 2003, "Modern Compressible Flow," Mc Graw Hill.

Sung, H. G., Yeom, H. W., Yoon, S. K., Kim, S. J. and Kim, J. G., 2010, "Investigation of Rocket Exhaust Diffusers for Altitude Simulation," Journal of Propulsion and Power, Vol. 26, No. 2, pp. 240-247. crossref(new window)