NASA/Lewis Research Center, 21000 Brookpark Road, Cleveland, OH 44135

A -- JET PLUME FLOW SOLUTION SOL 3-102158 DUE 092198 POC Heidi D. Shaw, Contract Specialist, Phone (216) 433-5346, Fax (216) 433-2480, Email Heidi.D.Shaw@lerc.nasa.gov WEB: Click here for the latest information about this notice, http://nais.nasa.gov/EPS/LeRC/date.html#3-102158. E-MAIL: Heidi D. Shaw, Heidi.D.Shaw@lerc.nasa.gov. This is an amendment to Request for Quotation 3-102158 issued on August 6, 1998. The purpose of this amendment is to respond to questions that have been received. Please note: the closing date for the request for quotation has NOT been extended,and remains at close of business SEPTEMBER 21, 1998. Please note, the numbering of questions is continued from amendment 1 (issued on August 12, 1998) and amendment 2 (issued on August 18, 1998): Question 4: "Is a technical proposal required?" Answer 4: As this procurement is being processed under simplified acquisition procedures, NASA Lewis intends to award multiple purchase orders under the simplified acquisition threshold. the current threshold $100,000. To that end -- the information we requested for interested parties to respond with in their quotation will be evaluated. An in-depth technical proposal does not need to be submitted. The following information is also provided: It is NASA's intention to improve the time for jet noise prediction by improving the speed with which accurate flow solutions can be obtained. Accuracy is defined as being accurate enough to be used in jet noise prediction. This is a nebulous definition, so the goal should be to capture as much of the steady and unsteady behaviour as possible within the one day time goal. It is our intention to use this procurement, within a workshop format, to extract existing ideas and solutions from the technical community. The goal is not to develop a whole new complex analysis procedure. The flow solution sought need not be generic enough to handle all flow fields. It only needs to solve the free jet plume solution from a subsonic nozzle. Also, for purposes of this procurement, the conditions upstream of the nozzle exit are given as temperatures and pressures. There is no attempt to capture the upstream (combustion) turbulence or transient phenomena. Posted 08/24/98 (D-SN241112). (0236)

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