MINI JET RADIAL COMPRESSOR DESIGN COMPETITION COMPETITION SPECIFICATIONS

Transcription

1 MINI JET RADIAL COMPRESSOR DESIGN COMPETITION COMPETITION SPECIFICATIONS

2 1. General Contents and Details of the Competition The competition is intended for university and postgraduate students. The purpose of the competition is to increase their interest, and develop their capabilities in the field of the aviation engine technologies. This document has been drawn up in order to lay down any and all rules and requirements with respect to the Mini Jet Radial Compressor Design competition held as part of the Technology Competitions in TEKNOFEST ISTANBUL Aerospace and Technology Festival (TEKNOFEST). In general terms, the document includes competition rules and design restrictions. The participating teams are expected to design a mini jet radial compressor, which will meet the design criteria as provided hereunder, and to draw up the report for such design. The compressor, designed as such, shall be produced with TEI's own means, and assembly, ground and flight test support shall be provided by TEI. Design of the winning team will be integrated into a turbojet engine to provide a thrust to the platform that will fly up to maximum 1000 feet and a group speed of 165 knots from the runway floor, and following the ground tests, the turbojet engine will be integrated into the high-speed flight platform, to be provided by the organization, and it will make a demonstration flight on the date of this event. The application form should be filled in until Each participating team can compete with maximum one design. The teams may comprise of maximum 5 members. Applications shall be received on the official website of TEKNOFEST Technology Competitions ( General Information: Production, integration and ground tests of the mini jet radial compressor designs, ranking among the top 3, shall be undertaken by TEI, and the winning design shall be integrated into the engine, and it will fly through the appropriate platform upon obtaining the airworthiness approval on the date of this event. 2. Technical Specifications and Restrictions for the Mini Jet Radial Compressor The mini jet radial compressor shall be in conformity with the pre-determined physical restrictions, and meet the aerodynamic/performance requirements. 2.1 Physical Restrictions for the Mini Jet Radial Compressor The sizes and profiles, specified under the physical restrictions, refer to the sizes that should be observed while the compressor is in cold condition.

3 Figure 1: 3D View of the Compressor Parameter Value Remarks Design Inputs Direction of Rotation of the Compressor Clockwise When viewed from front, direction of rotation of the compressor shall be clockwise. Design Requirements Sizes See. Figure 2 Tip Profile Sizes See. Figure 3 Number of Blades It shall not be multiples of 6 and 8. Weight (gram) 260 ± 15 Material Mechanical and Structural Aluminum 2XXX - Sizes of the compressor shall be in conformity with the ones provided under Figure 2. Compressor blade limits shall be in conformity with the tip profile sizes provided under Figure 3. The number of compressor blades shall be designed in a manner not to be multiples of 6 and 8. The compressor shall weigh 260± 15 grams. The materials, to be used in design processes of the compressor, shall be of aluminum 2XXX series. (Materials data shall be discussed between the participants and TEI, if and when so needed.) Any and all mechanical and structural requirements, sought to be fulfilled for the compressor, shall be shared with the teams who can proceed to the Critical design process.

4 Figure 2: Compressor Sizes Figure 3: Compressor Tip Profile Sizes

5 2.2 Aerodynamic/Performance Restrictions for the Mini Jet Radial Compressor Aerodynamic/Performance requirements refer to the ones that are sought to be fulfilled while the compressor is in hot condition. During the aerodynamic/performance activities for the mini jet radial compressor, the blade clearance shall be accepted as 0.25 mm while the compressor is in hot condition. The below requirements are given for the impeller only (compressor without diffuser) Design Point Requirements Design point of the compressor shall be at sea level ( kpa air pressure), standard day (15 C) and static condition. The lines, specified as the design inputs, refer to the analysis inputs, as well as the circumstances under which the design should be accomplished. The lines, specified as the design requirements, refer to the target values that should be achieved following the analyses. Design Inputs Design Requirements Parameter Value Remarks Shaft Speed (RPM) Shaft design speed of the compressor shall be rpm. Inlet Total Pressure* Design inlet total pressure of the (kpa) compressor shall be kpa. Inlet Total Temperature* Design inlet total temperature of the (K) compressor shall be K. The angle of the diffuser on the Diffuser Inlet Metal meridional axis shall be at hub and Angle (in degrees) at tip. Air Flow Rate (kg/s) ± Air flow rate of the compressor shall be ± kg/h. Total Pressure Ratio 4.60 Total pressure ratio of the compressor shall be Isentropic efficiency Isentropic efficiency of the compressor Surge Margin** 12 shall be between 0.87 and Surge margin value of the compressor shall be either equal to or greater than 12. *As the design point is a static condition, the total compressor inlet values should be considered equal to the static values. **Surge margin value should be found by means of the below-given formula. PRt-t/stall: Total pressure ratio at Stall/Surge point PRt-t/tas.: Total pressure ratio at Design point ṁt-t/stall: Air flow rate (kg/s) at Stall/Surge point ṁt-t/tas.: Air flow rate (kg/s) at Design point Off-Design Point Requirements

6 The off-design point requirements of the compressor are provided herein below. The lines, specified as the off-design inputs, refer to the analysis inputs while the lines, specified as the off-design requirements, refer to the target values that should be achieved following the analyses. The off-design point has been determined at a height of 300 meters and a speed of 0.25 Mach. (Standard day has the static temperature of K, and static pressure value of kpa under 300-meter conditions.) Off-Design Inputs Off-Design Requirements Parameter Value Remarks Shaft Speed (RPM) Shaft off-design speed of the compressor shall be rpm. Inlet Total Pressure* Off-design inlet total pressure of the (kpa) compressor shall be kpa. Inlet Total Temperature* Off-design inlet total temperature of the (K) compressor shall be K. Air Flow Rate (kg/s) ± Air flow rate of the compressor shall be ± kg/h. Total Pressure Ratio 2.59 ± 0.10 Total pressure ratio of the compressor shall be 2.59 ± Isentropic efficiency of the compressor Isentropic efficiency 0.85 shall be either equal to or greater than Surge Margin 12 Surge margin value of the compressor shall be either equal to or greater than Competition Schedule, Scoring and Evaluation 3.1 Competition Schedule Date Remarks February 28, 2019 Application Deadline April 30, 2019 Preliminary Design Report Submission Deadline May 15, 2019 Announcement of the Shortlisted Teams Based on the Preliminary Design Report Results June 30, 2019 Critical Design Report Submission Deadline July 21, 2019 Announcement of the Finalist Teams August 23, 2019 Production, Integration, Ground Tests and/or Flight Tests of the Designs by the Finalist Teams August 29, 2019 Announcement of the Winning Team September (TBA) Date of Flight Evaluation shall be performed in three different stages; namely Preliminary design report, critical design report and test scoring. Any team which fails to submit its preliminary design and/or critical design reports, shall not become eligible to proceed with the competition.

7 3.1.1 Preliminary Design Report All teams shall be obliged to submit their preliminary reports on April 30, The preliminary design report should include the mechanical design and CAD modelling of the mini jet radial compressor, as well as the velocity triangles on the mean line of the inlet and outlet of the compressor at design point. The preliminary design report (PDR) should have been submitted and approved in order to proceed to the next stage under this competition. A preselection shall be made based on the PDR results. All teams, which have passed the critical design report stage as a result of the PDR evaluations, shall be announced on May 15, PDR template and scoring content shall be shared with the teams upon expiration of the application deadline. Note: CAD files shall be sent in *.stp format Critical Design Report All teams, which have proceed to the critical design report stage, shall be obliged to submit their reports on June 30, Mechanical and structural design requirements shall be provided to the competitors who have proceeded to the critical design stage. Mechanical design of the mini jet radial compressor should have been updated, its CAD models should have been established, and the CFD solutions should have been received under the critical design report. With respect to the CFD solutions; compressor map for various engine speeds (60%, 70%, 80%, 90%, 100%, 110% RPM) should be prepared and submitted under the file. RANS equations should be solved in all analyses, and it is recommended to use a one- or two-equation turbulence model for turbulence modelling. Total pressure ratio, air flow rate, isentropic efficiency, outlet temperature, outlet pressure and surge margin values should be provided under the report with respect to the design point and the pre-determined off-design points. Boundary condition values, used in all analyses, should be indicated. Calculations for all mechanical and structural requirements sent to all teams, which have proceeded to the critical design stage, should be available. The critical design report (CDR) should have been submitted and approved in order to proceed to the next stage under this competition. Final selection shall be made based on the CDR results. All teams, which have passed the critical design report stage as a result of the CDR evaluations, shall be announced on July 21, CDR template and scoring content shall be shared with the teams upon expiration of the application deadline. Note: CAD files shall be sent in *.stp format Production & Assembly ve Tests Designs by the teams which have passed the CDR stage shall be produced, integrated and tested by TEI after the approvals for assembly and testing thereof are obtained. Any and all raw materials, to be needed during production, shall be provided by the organization. Upon completion of the test, all test data shall be reviewed, and teams' performance shall be compared (isentropic efficiency and total pressure ratio), and accordingly, the winning team shall be determined. The winning team shall be announced on August 29, Flight Upon the flight approval following the flight test carried out at the test area through the platform to be provided by the organization, the engine into which the winning design has been integrated shall make a demonstration flight at TEKNOFEST.

8 3.2 Competition Scoring and Evaluation Competition scoring consists of two parts; namely report scoring and test scoring Report Scoring and Evaluation (30%) The report scoring types and percentages are provided in the below-given table. Report scores shall account for 30% of the total score. Preliminary Design 10% Report Critical Design Report 20% Test Scoring and Evaluation (70%) The scoring types and values are provided in the below-given table. The scoring shall be made on a scale of 100 points, and accounts for 70% of the total score. Total Pressure Ratio 15 Isentropic efficiency 10 Surge Margin 15 Air Flow Rate 20 Vibration 20 Consistency of Analyses with 20 Measurements Total Total Score The maximum total score, which can be obtained in the competition, shall be 100 points, and calculated as follows: 4 Awards Total Score = 0.10 * PDR Score * CDR Score * Test Score Table indicates the total amount of prize, which will be given to the teams that earn the right to a prize. There will be no individual awards. First, second and third place prizes will be divided among all members of the team and will be transferred to each member s specified account. 1st place 2nd place 3rd place TRY TRY TRY 4.1 Minimum Success Criteria for Award Ranking Sizes and type profile sizes, provided under the requirements for physical restrictions, as well as pressure ratio and isentropic efficiency requirements should have been fulfilled on minimum basis in order to eligible for award ranking.

9 5 GENERAL RULES & PROVISIONS Teams have the right to object to the concerned judge through their team leaders. Objections can be made verbally, provided that they are submitted in writing at a later time. Verbal objections must be put in writing within 24 hours. In any case, non-written objections will not be taken into consideration. Objections will be finalized within 24 hours after having examined by the judge panel. Each contestant is responsible for taking the necessary precautions and showing the expected attention to his/her peers and the environment. Turkish Technology Team (T3) Foundation and the organization committee reserve the right to make any amendments to the specifications in order for the contest to take place in accordance with the specified impartial criteria so that any violations may result in judicial outcomes, to better meet any sorts of requirements by the contestants, to provide necessary safety precautions and to maintain the functionality of the contest specifications. Having made the necessary evaluations following the application deadline, the T3 Foundation and the organization committee reserve the right to cancel the contest given that sufficient number of applications is not reached with the required technical knowledge and skills. TEKNOFEST Safety and Security Terms and Conditions will be communicated to all contestants, delegations and concerned parties. All competing teams are responsible for observing the safety terms and conditions specific to their respective categories specified in TEKNOFEST Safety and Security Terms and Conditions. In this regard, with the exception of security precautions contained in the aforementioned security instructions, it is the contestants responsibility to take additional precautions arising from the systems employed. The T3 Foundation and the organization committee retain to exclude any and all teams from the contest who do not fulfill the terms and conditions of TEKNOFEST Safety and Security Terms and Conditions to provide a safe environment for holding the contest. T3 Foundation and organization officials cannot be held responsible for damages arising from the violation of terms and conditions by the contestants, delegations and concerned parties. Regarding the competition, the competitor hereby accepts and consents to any kind of written or visual promotion, publication, social media and internet broadcasting to be made by the T3 Foundation and / or TEKNOFEST before or after the competition. In addition, the competitor agrees and submits that any and all intellectual property generated as pertains to the competition, including but not exclusive to designs, code, and manufactured products, belongs exclusively to the T3 Foundation and / or TEKNOFEST and that the competitor does not have any rights to or demands on these artifacts. T3 reserves the right to disclose all intellectual property thereby for public consumption in a manner it deems fitting. In the event that a competitor infringes upon the intellectual property rights of any product, and T3 Foundation and/or TEKNOFEST incur damages, the responsibility for such damages will be borne entirely by the relevant participant(s). All teams who qualify to compete in the contest will be given a Participation Certificate.

10 5.1. Statement of Liability The Turkish Technology Team Foundation and TEKNOFEST are in no way liable for any injury or damage caused by any entry, any entrant, or by the disqualification of an entry. The Turkish Technology Team Foundation and TEKNOFEST at large are not responsible for ensuring teams operate their systems within the law of the Turkish Republic. The Turkish Technology Team Foundation and TEKNOFEST, and organization officials cannot be held responsible for the damages inflicted upon third parties by the contestants. Turkish Technology Team Foundation has the right to make any amendments to these terms and conditions.