December 7, 2010 through December 13, 2010

12/6/10

7:49 pm to 8:45 pm hrs = 56 min

11:09 pm to 2:42 am hrs = 3 hrs 33 min

I worked a little on the Gegenbauer solution. At the point to convert to cylindrical polar coordinates. Did the short section for normalization. I added a couple of sections to the hypersonic thesis. In chapter 2 under scramjets I added solid fuel and liquid fuel subsection. Under the fuel section I added two subsections. Began to write in solid fuel subsection covering paper by Ben-Arosh et al (1999). This paper has a theoretical approach to modeling the solid fuel scramjet. Ultimately I want to compare to our team's papers to see if similar approaches applied to solid rockets can be applied to solid fuel scramjets. So this will also add material to chapter 8 (analytical) and chapter 7 (cfd). So for tomorrow I would like to go further into Gegenbauer by getting to plots and review so more over solid fuel scramjets and previous team papers that might be similar.

Total hrs = 4 hrs 29 min

12/7/10

10:07 am to 11:38 am hrs = 1 hr 21 min

12:45 pm to 6:30 pm hrs = 5 hr 45 min

8:45 pm to 10:30 pm hrs = 2 hr 45 min

The majority of the time in the morning and afternoon was spent researching scramjet combustors. David G. Lilley has written many references on swirl flows, combustion, and combustors. It would be beneficial to review these references and more in order to compare to our methods and models so that we may be able to model hypersonic scramjet engines. Other names that have surfaced in this area include another well known name in the propulsion community, Alon Gany.

However, the second portion of the day was spend in a meeting with Dr. Majdalani. Many things were discussed and a shift has been taken. Plans are to wrap up the hypersonic thesis as soon as possible. Unfinished work might be able to be included in a appendix and can be worked on later after the PhD. A few things are needed to complete the thesis, and I hope to have them completed as soon as possible, preferably over the break so that I can defend as soon as possible as well. Thus, I will also begin working on the presentation.

At the same two other tasks, possibly three will be done asap as well. As soon as the thesis is done or quite possible along side it. The conical BDV needs to be finished and submitted. Not a whole lot to do there except maybe some info on the BHLSE, but prob not, and definitely do a quick comparison to Bloor and Ingham. As the thesis is being completed the gound testing section for the JSR paper can be completed as well. Then once these things are done the PhD proposal can be attempted and then other solutions, etc. can be pursued for completing the PhD. Maybe going to finish the hypersonics occasionally to keep it fresh.

Printed off a preliminary thesis draft after keeping essentials and putting unfinshed work into appendices. Hopefully we can keep the unfinished work to show where this was going and the potential of the project, and hopefully it can be done in a pleasing way to readers.

Total hrs = 1 hr 21 min + 5 hr 45 min + 2 hr 45 min = 9 hrs 51 min

12/8/10

12:45 pm to 1:45 pm hrs = 1 hr

9:45 pm to 10:45 pm hrs = 1 hr

I made a condensed version of my hypersonic thesis. I basically kept the bare bones then moved everything else into appendices. I am hoping to keep what I have started and not completed in the thesis. I would like to keep it as it is in the appendices, but I am not sure if it will remain that way if it does not please the committee. Hopefully, it can stay in some form or fashion. I also went through the early draft print out version and made notes and marked any typos/errors I caught.

Total hrs = 2 hrs

12/12/10

4:55 pm to 8:00 pm hrs = 3 hrs 5 min

I am going through the thesis and correct the errors/typos I caught earlier. I have finished the front matter except the abstract and nomenclature. I am working on the introduction where I have added some additional references for Edward T. Curran and S. N. B. Murthy, two prominent names in the propulsion community.

Total hrs = 3 hrs 5 min

12/13/10

2:05 pm to 5:07 pm hrs = 3 hrs 2 min

6:29 pm to 10:30 pm hrs = 4 hrs 1 min

I have added some more references related to Curran and Murthy. Here are some of the references noted from the past couple of weeks:

[1] A.J. Matthews, T.V. Jones, and T.M. Cain, “Design and Test of a Low Drag Hypersonic Intake,” 12th AIAA International Space Planes and Hypersonic Systems and Technologies, Norfolk, Virginia: 2003.

[2] A. Taha, S. Tiwari, and T. Mohieldin, “Effect of Combustor Configuration on the Flame Holding in Scramjet Engines,” 16th AIAA Computational Fluid Dynamics Conference, Orlando, Florida: 2003.

[3] E.T. Curran, “An Investigation of Flame Stability in a Coaxial Dump Combustor,” 1979.

[4] R.B. Edelman, C.Q. Morrison Jr., R.J. Pederson, D.H. Morris, and S.N. Schmotolocha, “Combined cycle engines incorporating swirl augmented combustion for reduced volume and weight and improved performance,” , June 2005.

[5] J.W. Benefield and L.M. Hair, “Inlet Flowfield Analysis for High Mach Number Applications,” Journal of Spacecraft and Rockets, vol. 4, May. 1967, pp. 650-656.

[6] E.T. Curran and M.B. Bergsten, Inlet Efficiency Parameters for Supersonic Combustion Ramjet Engines, 1964.

[7] E.T. Curran, J. Leingang, L. Carreiro, and D. Petters, “Further studies of kinetic energy methods in high speed ramjet cycle analysis,” AIAA/SAE/ASME/ASEE 28th Joint Propulsion Conference and Exhibit, Nashville, TN: 1992.

[8] S.N.B. Murphy and E.T. Curran, eds., Developments in High-Speed Vehicle Propulsion Systems, Reston, Va.: AIAA, 1996.

[9] S.N.B. Murthy and E.T. Curran, eds., High-Speed Flight Propulsion Systems, Washington, DC: AIAA, 1991.

[10] D.G. Lilley, “Modeling of combustor swirl flows,” Acta Astronautica, vol. 1, 1974, pp. 1129-1147.

[11] W.J. Angus, M.A. Witt, D. Laredo, and D.W. Netzer, “Solid fuel supersonic combustion,” La Recherche Aerospatiale, vol. 6, 1993, pp. 1-8.

[12] D.G. Lilley, “Flowfield modeling in practical combustors: A review,” Journal of Energy, vol. 3, 1979, pp. 193-200.

[13] S.-I. Cheng, “Hypersonic propulsion,” Progress in Energy and Combustion Science, vol. 15, 1989, pp. 183-202.

[14] H.J. Sheen, W.J. Chen, and S.Y. Jeng, “Recirculation Zones of Unconfined and Confined Annular Swirling Jets,” AIAA Journal, vol. 34, Mar. 1996, pp. 572-579.

[15] C.A. Martin, “Aspects of the design of swirlers as used in fuel injectors for gas turbine combustors,” 32nd ASME International Gas Turbine Conference and Exhibition, Anaheim, CA: 1987.

[16] M.A. Habib and J.H. Whitelaw, “Velocity Characteristics of Confined Coaxial Jets With and Without Swirl,” Journal of Fluids Engineering, vol. 102, Mar. 1980, pp. 47-53.

[17] M.M. Ribeiro and J.H. Whitelaw, “Coaxial jets with and without swirl,” Journal of Fluid Mechanics, vol. 96, 1980, pp. 769-795.

[18] N.A. Chigier, “Gasdynamics of Swirling Flow in Combustion Systems,” Astronautica Acta, vol. 17, 1972, pp. 387-395.

[19] N. Syred and J.M. Beér, “Effects of combustion upon precessing vortex cores generated by swirl combustors,” 14th International Symposium on Combustion, The Pennsylvania State University, University Park, Pennsylvania, August 20-25, 1972: 1972, pp. 537-549.

[20] J.M. Beér and N.A. Chigier, Combustion Aerodynamics, London: Applied Science Publishers Ltd, Halsted Press Division, Wiley, 1972.

[21] J.M. Beér and N.A. Chigier, Combustion Aerodynamics, Krieger Publishing Company, 1983.

I have several question to be answered at the earliest convenience concerning finishing the thesis.

1. Should the material concerning the conservation equations be removed? It made sense to have it there in the longer format. However, now I am not sure if it is needed. Also, does it makes sense to keep the review of the types of flows (inviscid vs. viscous, etc.)? I think this material might be ok since I am trying to show the differences of hypersonic flow. However, I am not sure if it is appropriate for a thesis. Maybe it can be condensed or left as is if it isn't that big of a issue. If so, then I need to finish a couple of subsections and add figures.

Total hrs = 7 hrs 3 min

Weekly hrs = 7 hrs 3 min + 3 hrs 5 min + 2 hrs + 9 hrs 51 min + 4 hrs 29 min = 26 hrs 28 min